`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

Find 1.8×8 is equal to

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

int_(0)^(oo)(dx)/([x+sqrt(x^(2)+1)]^(3)) is equal to (3)/(8) (b) (1)/(8)(c)-(3)/(8) (d) none of these

If in a A B C , =a^2-(b-c)^2, then tanA is equal to 15//16 b. 8//15 c.8//17 d. 1//2

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

If x ÷ 1 = 8 , then x is equal to ( a )   8   ( b )   1   ( c )   -8   ( d )   -1  

Identify and name the metal out of the following elements whose electronic configurations are given below. (a) 2,8,2 (b) 2,8,1 (c) 2,8,7 (d) 2,1.