Ask a New Question

if cos 2theta=1/3 and 0

sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),cos(2theta),tan(2theta) exactlysin(2theta) cos(2theta)
1. 2 answers
2. asked by Sally
3. 1,780 views
Solve tan(40/90) for the double angle cos(2theta). I know I use the x^2 + y^2 = r^2 formula and cos(2theta) = cos^2theta -
1. 1 answer
2. asked by Anna
3. 658 views
What is the integral of 1-tan^2theta from 0 to pi/3?Using the identity tan^2theta=sec^2theta-1, I got my answer to be 2pi/3 -
1. 1 answer
2. asked by Rachel
3. 582 views
establish identity5csc^2theta-3cot^2theta=2csc^2theta+3
1. 1 answer
2. asked by Anonymous
3. 440 views
if cot theta =7/8 , evaluate (1+sin^2theta)(1-sin^2theta)/(1+cost^2theta)(1+co-^2theta)the answer should be 49/64 but i couldn't
1. 2 answers
2. asked by rani
3. 1,068 views
sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),cos(2theta),tan(2theta) exactlysin(2theta) cos(2theta)
1. 1 answer
2. asked by Larry
3. 2,018 views
Demostrate the validity of tan^2theta-sin^2theta=sin^4theta sec^2theta
1. 1 answer
2. asked by Mb
3. 861 views
Cos(X+y)cos(x-y)= cos^2theta - sin^2thetaI foiled the left side as a start because I can kind of see sin^2+cos^2=1 but I can't
1. 1 answer
2. asked by Jerry
3. 377 views
solve the equation of the domain 0¡Ü¦È¡Ü2¦Ð3cos^2theta - 5costheta -1 = 3sin^2theta
1. 1 answer
2. asked by Amanda
3. 517 views
What values of theta between 0 and 2pi solve the following equation?sin squared (2theta)-sin(2theta)-2=0 NOTE: if you choose to
1. 1 answer
2. asked by Natalie
3. 556 views