How do I find the general solution of sin2x2cosx0 How do I f

Solution

sin2x-2cosx=0

sin(2a)=2sin(a)cos(a)

2sinxcosx-2cosx=0

take 2cosx as common

2cosx(sinx-1)=0

cosx=0 ,sinx-1=0

cosx=0,sinx=1

gneral solution is x=(2n-1)/2