Question

if (sin theta-1) (2cos theta-1) = 0, find theta

Answer 1

Value of Either of the bracket = 0

If SinQ -1 = 0
SinQ = 1
Theta = 90 degree

If 2CosQ -1 = 0
Cos Q = 1/2
Theta = 60 degree

So theta is either 60 or 90