5.The value of `(i^(4x+1)-i^(4x-1))/(2)` is equal to (a) `1` (b) `-1` (c) `-i` (d) `0`

The value of (1+i)^4+(1-i)^4 is

(1+i)^(4)+(1-i)^( 4) is equal to

("lim")_(xvecoo)(sin^4x-sin^2x+1)/(cos^4x-cos^2x+1) is equal to (a) 0 (b) 1 (c) 1/3 (d) 1/2

("lim")_(xvecoo)1/(1+nsin^2n x) i s equal to (a) -1 (b) 0 (c) 1 (d) oo

If secx+sec^2x=1 then the value of tan^8x-tan^4x-2tan^2x+1 will be equal to 0 (b) 1 (c) 2 (d) 3

The value of (1+i)(1+i^2)(1+i^3)(1+i^4) is a. 2 b. 0 c. 1 d. i

If (1-i)x+(1+i)y=1-3i , then (x,y) is equal to (a) (2,-1) (b) (-2,1) (c) (-2,-1) (d) (2,1)

("lim")_(x to 0)(x^4((cot^4x-cot^2x+1)/(tan^4x-tan^2x+1)))"is equals to" (a)1 (b) 0 (c) 2 (d) none of these

(1+2i+3i^2)/(1-2i+3i^2) equals a. i b. -1 c. -i d. 4

The value of sum_(n=1)^(13) (i^n+i^(n+1)) , where i =sqrt(-1) equals (A) i (B) i-1 (C) -i (D) 0