If `cosecx=2/sqrt3` and `cotx=-1/sqrt3` for x `in[0,2pi]` then `cosx+cos2x+cos3x+....+cos100x` is

If cos ecx=(2)/(sqrt(3)) and cot x=(-1)/(sqrt(3))x in[0,2 pi], then the value of cos x+cos2x+cos3x is equal to

If cosx=(sqrt(3))/(2) , find cos2x.

If 4cos^(2)x-2(1+sqrt(3))cosx+sqrt(3)=0 the solution set in [0,pi] is

If cos x=(-sqrt3)/2 and pi

If cos x=(-sqrt3)/2 and pi यदि cos x=(-sqrt3)/2 और pi < x < (3 pi)/2 , है, तो 2cot^2 x +3 cosec^2 x का मान है:

If x + y = 2pi//3 and cos x + cos y = sqrt(3)//2 , then x, y =

If cos x=(-sqrt3)/2 and pi अगर cos x=(-sqrt3)/2 और pi < x < (3 pi)/2 , है, तो 2 cot^2 x-3 sec^2 x का मान है:

If 2 sin x = sqrt3 , evaluate . 3 cos x - 4 cos^3x .

If cos (x-y)=(sqrt3)/2 and sin(x+y)=1/2 , then the value of x(0ltxlt90) is