Question

solve sinx^2 + cos2x - cosx = 0
@StudyGurl14

Answer 1

Sorry, I thought I could help, but know I'm not so sure.
@jim_thompson5910

Answer 2

use the substitution

\[\cos^(2x) = \cos^2(x) - \sin^2(x)\]

and things should become easier

Answer 3

but when you solve equations like that you are supposed to set one side to 0 so you can factor

Answer 4

ohhhhh

Answer 5

i get it, thanks!! but what about the sine and cosine?

Answer 6

@campbell_st

Answer 7

nevermind, i get it all now thanks!

Answer 8

well you have

\[\sin^2(x) + \cos^2(x) - \sin^2(x) - \cos(x) = 0\]

so what cancels out...?

then you can factor what's left for the solutions