Sunday
March 26, 2017

Post a New Question

Posted by on .

Find the exact value of cos (2theta) given csc theta = 8/3 and 0 < theta < pi/2

  • trig identities - ,

    cscx = 8/3
    sinx = 3/8
    cosx = sqrt [1 - sin^2x] = (sqrt55)/8
    cos(2x) = 2 cos^2x -1 = 46/64 = 23/32

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question