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Trig
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Simplify sin x cos^2x-sinx
Here's my book's explanation which I don't totally follow sin x cos^2x-sinx=sinx(cos^2x-1)
2 answers
asked by
Tara
949 views
We started a new lesson on Monday on identities. Our test is tommorrow. I have no idea of what I'm doing! Can somebody help me
2 answers
asked by
Jennifer
1,043 views
Solve: 3tan^2x-1=0. I got +/- (the sq. root of 3)/3 which is correct according to my study guide. However, I don't know how to
2 answers
asked by
Tara
698 views
In each right triangle ABC, find B. The right angle is at C.
1. a= 11.7 m, b= 14.9 m 2. The angle of depression from the top of a
2 answers
asked by
Lauren,=)
563 views
4tan^2u-1=tan^2u
3tan^2u=1 tan^2u=1/3 sq. root of (tan^2u)=sq. root of (1/3) tanu=sq. root of (3)/3 tanu=sq. root of 1 Did I do
1 answer
asked by
Tara
472 views
triangle with side lengths 172m, 155m, and 155m. calculate the area.
1 answer
asked by
Jacob
263 views
What is sin x= 13/12
1 answer
asked by
Jessica
317 views
tanBeta/(1-cos^2Beta)
(sin/cos)times (1/sin^2)=sin/(cossin^2) 1/cossin Is this as far as I can reduce it?
1 answer
asked by
Tara
306 views
4sin^2x-1=0
Are the angles 30, 120, and 210 and 300?
1 answer
asked by
Tara
398 views
4sin^2x-1=0
Are the angles 30, 120, and 210 and 300?
1 answer
asked by
Tara
328 views
I'm confused on how to determine what the end result angles are for a trigonometric identity (I get how to find the value of
1 answer
asked by
Tara
673 views
what is 2 pi over 1/5 reduce to?
1 answer
asked by
Jennifer
260 views
How do you find the H-Shift.
My problem is y=5 sin(3x-pi/2).
9 answers
asked by
Jennifer
366 views
What is the solution set of the inequality x^2-x>20?
a)x>5 b)-4<x<5 c)x>5 or x<-4 d)x>0
4 answers
asked by
Christian
637 views
Give the exact value of the trigonometric function:
arctan(√3)
2 answers
asked by
Trevor
488 views
In the equation y=4cos 6x, what does 6 represent?
In general for the equation y-acosbx, what does b represent?
1 answer
asked by
Kevin
338 views
in the equation y=acos b(x-h)+k, what exactally does b represent. How is it helpful?
1 answer
asked by
Kevin
316 views
Thanks for letting me know about wave seperation. Could you tell me more please. What exactally is meant by wave seperation.
1 answer
asked by
Kevin
336 views
Let O represent the origin and P be the point (9, -4). Find the positive angle (counterclock wise direction)that the line
2 answers
asked by
Drew
526 views
2cos^2Beta-Cosbeta=0 (find all solutions for the equation in the interval 0, 2 pi). I have no idea how to go about doing this.
3 answers
asked by
Janie
834 views
Let O represent the origin and P be the point (9, -4). Find the positive angle (counterclock wise direction)that the line
2 answers
asked by
Drew
489 views
How would you find tan80 and tan55 as needed in this problem?
Use identities to find each exact value.
1 answer
asked by
Chloe
328 views
How do I simplify this?
cos4xcos3x-sin4xcos3x I pulled the cos3x out as a common factor but that doesn't really help. Can someone
3 answers
asked by
Scott
547 views
How do you express these problems as single trigonometric function values or as single numbers, using identities?
1.
1 answer
asked by
Kelly
381 views
How do you express these problems as single trigonometric function values or as single numbers, using identities?
1.
1 answer
asked by
Jessica
486 views
What is the exact value of cot(4pi/3)?
Do not use a calculator.
3 answers
asked by
Lori
1,684 views
How do I solve the following?
sec 3 theta/2 = 2 on the interval 0<theta<2 pi? I tried to look in my textbook but it doesn't have
3 answers
asked by
Katie
3,005 views
A body of unknown mass is attached to an ideal spring with k=120 n/m. it is found to vibrate with a frequency of 4 Hz. find the
2 answers
asked by
Nicole Lovato
784 views
How would I do this problem?
Verify that each equation is an identity. cos^2x+tan^2xcos^2x=1 the ^2 is just saying squared. ex.-
1 answer
asked by
Jill
347 views
Verify that each equation is an identity.
cos^2x+tan^2xcos^2x=1
1 answer
asked by
Jill
351 views
evaluate exactly(without calculator):
1. sec(pi/4) 2.3sin4pi 3. tan240(degrees)
3 answers
asked by
Amy
355 views
I'm really having a hard time determining an equation for a pendulum problem. It has to be in the form H(t)=asin[b(t-c)]=d. I've
1 answer
asked by
Matt
430 views
If I have a triangle with the hypotenuse side as 7, and the opposite side as 3, how would I find the angle? (This is a right
1 answer
asked by
Jill
420 views
Find all solutions w between 0 and 360, inclusive:
(a) cosw = cos(−340) (b) cosw = sin20 (c) sinw = cos(−10) (d) sinw < − 1
2 answers
asked by
Sally K
559 views
tan(2x)=root3 over 3
3 answers
asked by
Chelly
693 views
A ship is headed directly toward a coastline formed by a vertical cliff (segment BC) that is 80 meters high. At point A, from
4 answers
asked by
Amanda
2,717 views
Solve for x in the interval [0,2pi) sin^2x+2cosx=2
2 answers
asked by
Tina
536 views
Prove the trig identity
cos(4x)=2-sec^2(2x)/sec^2(2x)
1 answer
asked by
leo
330 views
Given that tan(pi/2) = a. Express tan(x) and sin(x) in terms of a. Hint: Use the fact that x = 2.(pi/2)
3 answers
asked by
Jack
362 views
Prove the trig identity
cos(4x)=2-sec^2(2x)/sec^2(2x)
1 answer
asked by
kristina
358 views
Sin theta = 4/5
i got 53.1 as an answer but on my answer sheet is also has 126.9 How do i get that 126.9?
1 answer
asked by
Dho
374 views
The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60-degree angle at P.
(a) Find the
1 answer
asked by
Sarah
696 views
What are some real life applications of logarithims?
1 answer
asked by
Joe Schmo
371 views
What are some real life applications of logarithims?
1 answer
asked by
Joe Schmo
349 views
a boeing 747 jet maintains an airspeed of 650 miles per hours in a southwesterly direction. the velocity of the jet stream is a
2 answers
asked by
Karley
774 views
Need answer check pls. Find the rectAngular equation for the plane curve by parametric equAtions. X=t +4 , y= t^2
2 answers
asked by
Stacey grahaM
474 views
Solve for X:
5sinx+2cos2x-3=0
4 answers
asked by
=
725 views
A railroad tunnel is shaped like semi-ellipse. The height of the tunnel at the center is 69 ft and the vertical clearance must
4 answers
asked by
Stacey grahaM
5,829 views
Suppose you would like to cross a 204 ft wide river in a boat. Assume that the boat can travel 37 mph relative to the water and
2 answers
asked by
Stacey grahaM
630 views
Use identities to find indicated values
tan (theta)= (12/5), pi <0<3pi/2 Find sin (2theta)
1 answer
asked by
Stacey grahaM
414 views
How do I solve this problem?
tan (30° + x)
1 answer
asked by
Abby
344 views
How do i set this trig problem up? PLEASE help me.
Find tan (s + t) given that sin s = 1/4, with s in quadrant 2, and sin t =
1 answer
asked by
Dave
415 views
Find cos(s+t) if cos s= -1/2 and sin t= 3/5, s and t are in quadrant II.
I got the answer to be -4/10 plus -3sqrt(3)/10. Is that
2 answers
asked by
Anonymous
815 views
Tan theta 12/5 ,pi <theta<3pi/2
Find sin 2theta
3 answers
asked by
Stacey grahaM
1,705 views
Solve the equation in the interval [0•,360•]
Csc theta = 1+cot theta
4 answers
asked by
Stacey grahaM
688 views
(2-2i)^5
find the given power write answer in rectangular form
3 answers
asked by
Stacey grahaM
1,292 views
Nathan and Julia are walking along lines that form a 38 degree angle. If Nathan walks at 3.6 miles per hour and Julia walks at
3 answers
asked by
MEGGG!!!
464 views
A swimmer heads perpendicular to a 2-miles-per-hour current. His speed in still water is 1.8 miles per hour. Find the actual
2 answers
asked by
MEGGG!!!
1,164 views
A swimmer heads perpendicular to a 2-miles-per-hour current. His speed in still water is 1.8 miles per hour. Find the actual
1 answer
asked by
MEGGG!!!
398 views
Given 2secant^2 (theta) + 1 = 5 secant (theta), solve for (theta), to the nearest degree, in the interval 0 degrees is greater
2 answers
asked by
Courtney
548 views
8 csc theta - 2=10 + 2 csc theta
I can't do it. :S
1 answer
asked by
Amir
881 views
Solve the right triangle ABC using the given information: cos A = 2/5 ; c = 15
1 answer
asked by
Anonymous
382 views
Find three additional polar representation of the point (-3, pie over 6) given in polar coordinates,using -2 pie <0 <2pie.
2 answers
asked by
Sasha
760 views
Cos(21)cos(9)-sin(21)sin(9)
2 answers
asked by
Anonymous
674 views
Even if you have no idea what on earth any of this stuff is but have a vast knowledge in complex number system you might be able
2 answers
asked by
Kate
483 views
I was doing this problem
sin^-1 (4/5) if I'm not mistaking most teachers would say that .927295218 radians is wrong is just an
6 answers
asked by
Kate
677 views
Determine the roots of the function f(x)=-2cos(3x)-1. Can you please show all the work so it is easier to understand, thank
5 answers
asked by
Nada
1,137 views
a) Determine the equation of a sine function that would have a range of {y€R|-7<(or equal) Y <(or equal) 1} and a period of
3 answers
asked by
Nada
1,006 views
verify following trigonometric identities. 1/sec0tan0 = csc0 = sin0
3 answers
asked by
Jose
587 views
Find the reference number and the terminal point determined by t.
a. t = - 7(pi)/6
2 answers
asked by
Mars
1,228 views
Find the value of the six trigonometric functions.
t = 7(pi)/4 Can you show me step by step so I can see how this is solved?
2 answers
asked by
Mars
587 views
If b=5 , the angle C=50 and the angle A=50 find the other angle B and the remaining sides and . Give your answer to at least 3
1 answer
asked by
bob
329 views
Find the general solution for the equation 4tanx+cotx=5?????? and the steps please? THANYOO!
3 answers
asked by
Valerie
1,847 views
Solve for 0≤x≤2π
---> (2√2)cos²(x)-(√2-2)cos(x)-1=0 much thanks .
1 answer
asked by
mickey
418 views
Solve for 0<x<2pi
---> (2radical2)cos^2(x)-(radical2-2)cos(x)-1=0
1 answer
asked by
mickey
373 views
A force of 323 newtons makes an angle of 54 degrees and 20 minutes with a second force. The resultant of the two forces makes an
1 answer
asked by
Brittany
818 views
tan^2t/sect=sect-cost
cott^2/csct=csct-sint
2 answers
asked by
Mike
895 views
What expression represents the same value as sin 19(degrees)?
2 answers
asked by
Rob
499 views
Simplify:
(cosx + cos2x + cos3x + cos4x + cos5x + cos6x) / (sinx + sin2x + sin3x + sin4x + sin5x + sin6x) into a single Cotangent
4 answers
asked by
Jeff
1,588 views
assume a pulley has a radius of 12.96 cm. If it takes 18 seconds for 56 cm of belt to go around the pulley, find the angular
4 answers
asked by
SK
3,821 views
A plane flies 1.3 hr at 100mph on a bearing of N40degreesE. It then turns and flies 1.5hr at the same speed on a bearing of
2 answers
asked by
SK
807 views
The angle of depression from the top of the building to a point on the ground is 29degrees30', the point of the ground is 36
3 answers
asked by
SK
1,405 views
the angle of depression from the top of a building to a point on the ground is 32degrees30', how far is the point of the ground
1 answer
asked by
SK
485 views
find sin(s+t), given that sin t=1/3, t in quadrant 2, and cos s = -2/5, s in quadrant 3
2 answers
asked by
SK
498 views
Find the value of tangent of angle A, given cos2A = 4/5, and A terminates in quadrant 2
3 answers
asked by
SK
572 views
How do I do this? I punch the numbers into my calculator, and they don't work.
B=sin^-1 (12/7 sin42\[Degree])
1 answer
asked by
Jane
395 views
a student says there can only be 360 different rays emanating from a point since there are only 360 degrees in a circle. Is this
2 answers
asked by
Brian
568 views
A curve with polar equation
r=(8)/7sinx + 36cosx represents a line. This line has a Cartesian equation of the form y=mx+b ,where
4 answers
asked by
Audrey
987 views
An airplane is flying on a compass heading (bearing) of 340 degrees at 325 mph. A wind is blowing with the bearing 320 degrees
5 answers
asked by
K
4,134 views
Determine the frequency of y = 2 �� 3 cos 10x. (nearest tenth)
Please help!
3 answers
asked by
Kay
336 views
Determine the frequency of y = 2 - 3 cos 10x. (nearest tenth)
Please help
2 answers
asked by
Kay
899 views
Write the equation of the sine function with an amplitude of 1/7, a period of 2pi, a phase shift of 6pi, and a vertical shift of
3 answers
asked by
Tabby
1,669 views
Could someone please show me how
1 / ( 4 tan (x/2) + 2 ) is converted to: (- sin (x/2) /( 2 sin (x/2) + cos (x/2)) TIA Carol
3 answers
asked by
Carol
378 views
Determine the period of the function: f(x)=3sin1/2x+2 ?
1 answer
asked by
Janey
399 views
4. Write the equation of the cosine function with an amplitude of 1/3, a period of 2pi, and a phase shift of 3pi/2.
5. Write the
3 answers
asked by
Tabby
1,595 views
2.Graph f(x) = 1/4 cos(1/2 x + pi/2). Find the amplitude, period, and phase shift of the function.
3. Graph f(x) = -cos(3x + pi).
1 answer
asked by
Tabby
777 views
f(x) = -cos(3x + pi). Find the amplitude, period, and phase shift of the function.
2 answers
asked by
Tabby
718 views
Verify the identity:
tanx/secx-1=secx+1/tanx
1 answer
asked by
Tabitha
428 views
Verify that 7pi/6 is a solution to
2sin2x–sinx=1.
1 answer
asked by
Tabitha
962 views
Verify:cos(360degrees-x)=cos x
1 answer
asked by
Tabitha
388 views
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