Factor the algebraic expression below in terms of a single trigonometric function?
Tonight is really not my night for math...I am SO confused on how to factor trigonometric functions.
cos x - sin^2 x - 1
This expression doesn't have any common factors? Do I need to use sin^2 + cos^2 = 1? How do I get cos^2 in the original expression?
I really appreciate your help :/ Sorry for all the questions tonight