Question

solve for x
cos^2 x - sin^2 x = sinx

Answer 1

\[-\pi < x \le \pi\]

Answer 2

any ideas?

Answer 3

should i make everything sin?

Answer 4

ok. i see where you are going with this.

Answer 5

or nope don't just let me think

Answer 6

then we would subtract 1 to get \[-2\sin ^{2}x = \sin x -1\]
correct?

Answer 7

yup it's correct but i just solved it by making everything cos

Answer 8

is it easier that way?

Answer 9

idk i will show u my solution