Question

Isolate the variable, sketch a reference triangle, find all the solutions within the given domain
0≤x≤2π
sin²x+cos2x-cosx=0

Answer 1

@zepdrix please help

Answer 2

Have you considered:

1) \(\sin^{2}(x) = 1 - \cos^{2}(x)\)

2) \(cos(2x) = 2\cos^{2}(x) - 1\)

Answer 3

@tkhunny thanks, i got it now