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Trigonometric Identities
Page 9
Questions (1,668)
Evaluate the expression cos75°sin15°+sin75°cos15°
4 answers
asked by
Chad
622 views
Rewrite the expression secvcscv+cotv/secvcscv in terms of sine and cosine, then simplify using trigonometric identities.
2 answers
asked by
Bob
637 views
Evaluate tan(tan^-1 (π/3) + (π/4) )
9 answers
asked by
damilous
415 views
cos²(θ) – 3sin(θ) – sin²(θ)= –2
____________________________ I am having a hard time figuring out what to do. Do I use
3 answers
asked by
sweetiepie
444 views
Write y= -2+7csc(3x-6) in terms of secant.
3 answers
asked by
Oniess
429 views
Show that sin(x+pi)=-sinx.
So far, I used the sum formula for sin which is sin(a+b)=sin a cos b+cos a sin b. sin(x+pi)=sin x cos
5 answers
asked by
girly girl
1,305 views
I am currently working on a problem relating to trigonometric identities and I seem to be stuck. The question wants me to find
3 answers
asked by
Kathryn
466 views
Prove cot u - cot 2u=cosec 2u?
2 answers
asked by
Nick
498 views
cotxsinx - cosx + cosx
Does this equal cos x ? cos/sin * sin = cosx
4 answers
asked by
Anonymous
452 views
Use half angle indentites to find an exact value without a calculator
Cos(11π/12)
1 answer
asked by
Jacob
433 views
tanx cotx
------- + ------- = 1 +secxcscx 1 - cotx 1- tanx prove the proof
3 answers
asked by
SkiMasktheSlumpGod
620 views
Show that the following statement is an identity by transforming the left side into the right side.
sinθ(cscθ − sinθ)= cos^2
2 answers
asked by
Kim
493 views
Use the Pythagorean indentities rather than reference triangles. Find tan θ and cot θ if sec θ=8/7 and sin θ <0
4 answers
asked by
Bill
456 views
Write the following expression as the sine, cosine or tangent of an angle.
cos 3x cos 2y + sin 3x sin 2y
1 answer
asked by
Mariam
459 views
Use the Pythagorean identities rather than reference triangles.
Find tanθ and cotθ if secθ = 3/2 and sinθ <0 Please help me ,
3 answers
asked by
Nathan
541 views
Evaluate using the Pythagorean indentities
Find sinθ and cosθ if tanθ =1/6 and sinθ >0 Help please ! Thank you !
2 answers
asked by
Bob
522 views
tan4theta = (radical 3) / 3
theta = 7pi/24, 13pi/24, 19pi/24 Let me know if im right.
4 answers
asked by
SkiMasktheSlumpGod
481 views
Prove
Sin 8theta -sin 10theta= cot 9theta (cos 10theta - cos 8 theta)
3 answers
asked by
Jessica
478 views
Verify the Identity.
cos^4xcsc^2x = csc^2x + som^2x - 2
3 answers
asked by
Brit
785 views
A=170 degree then prove that Tan A/2=-1-rot(1+Tan^2 A)/Tan A
4 answers
asked by
Binoy kumar mahato
1,374 views
prove cos(pi-x)= -cosx
1 answer
asked by
lilpump
320 views
Prove the following to be an identity
(cotx + cscx)*(1-cosx)=sin x
4 answers
asked by
Kevin
385 views
sin^2 x + cos^2 x = 1
using that, derive what the cot^2 x would equal to. would it be csc^2 x - 1 = cot^2 x
1 answer
asked by
Kevin
427 views
Verify the identity.
(csc(2x) - sin(2x))/cot(2x)=cos(2x) =csc(2x)/cot(2x) - sin(2x)/cot(2x) =csc(2x)/cot(2x) - cos(2x) Is this
3 answers
asked by
Karry
1,412 views
Verify the identity.
cos x - sec x = -sin x tan x So far I have applied a reciprocal identity =cos x - 1/cos x I know I must
3 answers
asked by
Karry
549 views
sinα/1+ cosα is equals to.....
1 answer
asked by
Yubaraj
312 views
Since sec^2θ - 1 = tan^2θ
I know this is trivial, but I want to make sure I'm doing this right before I apply it to the
4 answers
asked by
Ray
489 views
Rewrite 4sin(x)-5cos(x) as Asin(x+phi)
5 answers
asked by
Anonymous
2,581 views
Someone please help me prove these
A) cos^4x-sin^4x=cos2x B)tanx=sin^2x/1+cos^2x Please and Thank you
2 answers
asked by
Samantha
465 views
Please help me proof the identity. This isn't even math to me, I can not understand it so please show all work. God bless
A)1-cos
3 answers
asked by
Rachel
598 views
Please help using identities
(2tan30)/(1-tan^2 30)
4 answers
asked by
Hannah
315 views
Please help me to simplify using identities
1+tan^2x/tan^2x I don't really understand how to do please help
3 answers
asked by
Hannah
300 views
2sin^2(2/A)+cosA=1
Please help me verify using identities
1 answer
asked by
Hannah
291 views
Cot^2x-csc^2x
Please help me simplify using identities! Thank You!
3 answers
asked by
Sarah
361 views
(sin x + cos x)^2 tan x = tan x + 2 sin^2 x
please help me verify the identity
3 answers
asked by
sarah
421 views
find the period cos(theta/4)
step plz
4 answers
asked by
weryiyemi
281 views
Use the identities cos^2 x + sin^2 x =1
and cos2x=cos^2 x -sin^2 x to show that cos^4 x -sin^4 x = cos2x Im not sure how, I can
2 answers
asked by
Anon
474 views
Given:
sin x = 4/5, 0 < x < π/2 sin y = 5/13, π/2 < y < π Find the exact value of sin(x + y) I presume I'm supposed to use the
3 answers
asked by
R
743 views
If x = cos@ + isin@ , y = cos€ + isin€ ' prove
that (x - y)/(x + y) = itan((@ - €))/2 step sir plz
2 answers
asked by
pooo
570 views
if secA-tanA =10 than sinA =?,cosA =?,secA =?
2 answers
asked by
Anonymous
605 views
if sinA=-(12/13) and -90<A<0, find without using calcuator, the value of cot(90-A)
3 answers
asked by
AlexMaths
344 views
Cos^4(x)+sin^4(4)=cos(2x)
Plz help.
3 answers
asked by
Anonymous
306 views
sin(7x)= sin(x)[cos^2(3x)-sin^2(3x)]+2cos(x)cos(3x)sin(3x)
I tried for an hour but still don't know how. Plzz help
2 answers
asked by
Anonymous
475 views
Prove that
(cos40-sin30)/(sin30-cos50)=tan50
2 answers
asked by
someone
835 views
cosx+cosy=a and sinx+siny=b show that sin2x+sin2y=2ab(1-(2/(a^2+b^2))
plz plz show step
7 answers
asked by
maths
1,794 views
IF
(1/SinA)+(1/cosA)= (1/sinB)+(1/cosB) Prove that cot((A+B)/2)=tanA tanB Please helppppppppppp
1 answer
asked by
A GOODSTUDENT
743 views
Use the half-angle formula to simplify (sin4theta)/(1+cos4theta)
3 answers
asked by
Sade
583 views
Given Tan(A) = 5 in Quadrant III and Sin(B) = ⅔ in Quadrant II, find Cos(A-B).
2 answers
asked by
Iris
523 views
Given Sin(A) = ⅗ and Cos(B) = 8/17 in Quadrant I, find Cos(A+B).
2 answers
asked by
Sade
469 views
Given Sin(A) = ⅗ and Cos(B) = 8/17 in Quadrant I, find Sin(A+B).
1 answer
asked by
Iris
415 views
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Parent Categories (14)
Algebra
Algebraic Simplification
Basic Trigonometric Functions
Calculus
Cosine and Sine
Functions
Functions and Formulas
Mathematics
Simplifying expressions
Tangent
Tangent Function
Trigonometric Equations
Trigonometric Functions
Trigonometry