Question

Factor the algebraic expression below in terms of a single trigonometric function. cos x - sin ^2x - 1

Answer 1

\[\sin^{2}x = 1- \cos^{x}\]

so \[cosx - (1-\cos^{2}x) -1 = \cos^{2}x + cosx -2\]

Answer 2

let x = cosx

now you need to factor \[x^{2} + x -2 = 0\]

Answer 3

Ok thank you