Answer:
It is given that : 
As we have to find the Domain of
.
-1 ≤ sin x ≤1

So it is defined for x lying between
.
As meaning of Domain is those values of x for which any function f(x) is defined.
Answer:
40
Step-by-step explanation:
The angles are around a point
We know that the sum of angles around a point add p to 360 degrees
Also, opposite angles are equal, which makes the angle opposite to 160 also 160.
Thus D = 360-(160+160) = 360-320 = 40 degrees
Hope this helps