`8 cot^2A-8 cosec^2A` is equal to
a) 8
b) `1/8`
c) `-8`
d) -`1/8`

8cot ^(2) A-8 cosec ^(2)A is equal to

9sec^2A-9tan^2A is equal to (a) 1 (b) 9 (c) 8 (d) 0

int_0^oo(dx)/([x+sqrt(x^2+1)]^3) is equal to (a) 3/8 (b) 1/8 (c) -3/8 (d) none of these

8 ml is equal to (a) 0.8 L (b) 0.08 L (c) 0.008 L (d) None of these

((-1)/2)^5*\ ((-1)/2)^3 is equal to (a) ((-1)/2)^8 (b) -\ (1/2)^8 (c) (1/4)^8 (d) (-1/2)^(15)

If A and B are two independent events such that P(A cup B) = 0.8 and P(A) = 0.3 then P(B) is equal to: a) 2/3 b) 5/7 c) 1/8 d) 3/8

The product (x^2-1)(x^4+x^2+1) is equal to: (a) x^8-1 (b) x^8+1 (c) x^6-1 (d) x^6+1

int_(-pi/3)^0[cot^(-1)(2/(2cosx-1))+cot^(-1)(cosx-1/2)]dx is equal to (pi^2)/6 (b) (pi^2)/3 (c) (pi^2)/8 (d) (3pi^2)/8

int_(-pi/3)^0[cot^(-1)(2/(2cosx-1))+cot^(-1)(cosx-1/2)]dx i s equal to (pi^2)/6 (b) (pi^2)/3 (c) (pi^2)/8 (d) (3pi^2)/8

Cube of (-1)/2i s (a) 1/8 (b) 1/(16) (c) -1/8 (d) (-1)/(16)