Answer:

Step-by-step explanation:
We are given that 
We have to find all solutions of the given equation
We know that 
sin x is positive then the value of sin x will lie in I quadrant and II quadrant.The value of sin x is negative in III and IV quadrant .
We are given that sin x is positive then the solution will lie in I and II quadrant only.Therefore, the solution of sin x will not lie in III and IV quadrant .
...(I equation )and
...(II equation)
In II quadrant
change into
Cancel sin on both side of equation I
Then, we get


...(II equation )
Cancel sin on both side of equation II
Then we get

Hence, the solutions of equation are
