If `4nalpha =pi` then `cot alpha cot 2 alpha cot 3alpha ...cot (2n-1)alpha` `n in Z` is equal to

If 4n alpha=pi then cot alpha cot2 alpha cot3 alpha...cot(2n-1)alpha n in Z is equal to

If 4nalpha=pi , then cotalpha cot2alpha cot3alpha.... cot(2n-1)alpha is equal to

If cot^3alpha +cot ^2 alpha + cot alpha =1 then

Prove that cot alpha - tan alpha =2 cot 2 alpha.

cot alpha+cot(60+alpha)-cot(60-alpha)=3cot3 alpha

If tan alpha+cot alpha=sqrt3 , then tan^(3)alpha+cot^(3)alpha is equal to

tan alpha+2tan2 alpha+4tan4 alpha+8cot8 alpha=cot alpha

If sin theta sin(2 alpha+theta)sin(4 alpha+theta),......sin(2(n-1)alpha+theta)=(sin theta)/(2n-1) where 2n alpha=pi then cot(theta)+cot(2 alpha+theta)+cot(4 alpha+theta)+......+cot(2(n-1)alpha+theta))=

Prove that tan alpha + 2tan 2alpha + 4tan 4alpha + 8cot 8alpha = cot alpha .