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math (trig)

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from the top of a bridge over the burlington canal, maria looks down at a sailboat at an angle of depression 15 degrees.the
1. 4 answers
2. asked by haley
3. 1,218 views
i have some problems doing trigthe first one is: Show that cos(x/2) sin(3x/2) = ½(sinx + sin2x) i know that you are supposed to
1. 1 answer
2. asked by jacob
3. 1,079 views
Find sin(x/2) if sin(x)= -0.4 and 3pi/2 < or equal to (x) < or equal to 2piLet's use cos 2A = 1 - 2sin<sup>2</sup> A and we can
1. 1 answer
2. asked by aziiancaligirl
3. 645 views
Prove:sin^2(x/2) = csc^2x - cot^2x / 2csc^2(x) + 2csc(x)cot(x) On the right, factor the numberator as a difference of two
1. 1 answer
2. asked by aziiancaligirl
3. 452 views
Im having problems solving this equation:2sin(x) = cos(x) + 2 I keep getting an imaginary number..:/
1. 6 answers
2. asked by jess
3. 428 views
how do you solve for x?2cos^24x-1=0
1. 6 answers
2. asked by Crystal
3. 1,016 views
if cos 2 theta = -(1/3) and theta is in Quadrant 2, find sin theta, cos theta, tan theta, and draw triangle theta
1. 3 answers
2. asked by Jeff
3. 1,459 views
For the following value of cos 0, determine the rad value of 0 for pi < 0 < 2pi(greater than or equal to pi and 2pi) -1/2 I
1. 3 answers
2. asked by Laura
3. 524 views
Given tan 0 = -5/12 determine the possible values of 0 to the nearest hundrethSo what I did is find that tan-1(5/12) equals
1. 2 answers
2. asked by Laura
3. 470 views