`frac{1}{8}` is equal to

{(1/3)^2}^4 is equal to (a) (1/3)^6 (b) (1/3)^8 (c) (1/3)^(24) (d) (1/3)^(16)

The value of sum_(r=1)^oocot^(- 1)((r^2)/2+15/8) is equal to

sqrt((-8-6i)) is equal to (where, i=sqrt(-1)

(sec8A-1)/(sec4A-1) is equal to (A) (tan2A)/(tan8A) (B) (tan8A)/(tan2A) (C) (cot8A)/(cot2A) (D) none of these

The value of sum _(r =1) ^(oo) (8r)/(4r ^(4) +1) is equal to :

If the middle term of (x + 1/x"sin"^(-1)x)^(8) " is equal to (630)/(16) , the value of x is/are

The value of cos (1/2 cos^(-1) . 1/8) is equal to

((1+i)/(sqrt(2)))^8+((1-i)/(sqrt(2)))^8 is equal to

The sum of rational term(s) in (sqrt3 + 2^(1/3) + 5^(1/4))^8 is equal to

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