1.
If sin-1x + sin-1y + sin-1z = then the value of x + y² + z3 is
2.
The value of tan²(sec-12) + cot2(cosec-13) is
3.
The domain of the function^ = sin' -'(V) is
4.
If  sec-1 x + sec-1 y = \frac{\pi}{2}  the value of cosec-1x + cosec-1y is
5.
tan-1{sin (-\frac{\pi}{2})} is equal to
6.
sec{tan-1 (-\frac{y}{3})} is equal to
7.
Principal value of the expression cos-1[cos(-680 Degree)] is
8.
Principal value of sin-1 \frac{1}{2} is