Please find value ofthe given problem. I will be thankful to you. I was facing problem in this sum.

Dear student

Kindly notice that all terms are squares so to obtain 0 only one condition satisfies ie all the terms individually must be 0

therefore, solution to asked problem is 1+1+1 = 3
or -1-1-1 = -3

as sin x = 0 x can be 0 or pi