How do you find the general solutions for #sinx = cos2x#?
So, let's solve the equation now,
As we just need the general solutions, we should take only this two values as the general solutions .
Solve sin x = cos 2x
Apply trig identity:
Since (a - b + c = 0), use Shortcut. Two real roots: sin x = -1 and
sin x = -1 --> x = 270 deg
x = 30 + k360 deg
x = 150 + k360
x = 270 + k360.