`1/(tan3alpha-tanalpha)-1/(cot3alpha-cotalpha)=cot2alpha`

(1)/(tan3 alpha-tan alpha)-(1)/(cot3 alpha-cot alpha)=cot2 alpha

tanalpha+2tan2alpha+4tan4alpha+8cot8alpha=?

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

Prove that: tan alpha+2tan2 alpha+4tan4 alpha+8cot8 alpha=cot alpha

Prove that cotA-tanA=2cot2A and deduce that tan alpha+2tan2alpha+4tan4alpha+8cot8alpha=cot alpha

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

If cot^3alpha+cot^2alpha+cotalpha=1 then (a) cos2alpha.tanalpha=-1 (b)cos2alpha.tanalpha=1 (c) cos2alpha-tan2alpha=1 (d)cos2alpha-tan2alpha=-1

prove that :tan(alpha)+2tan(2 alpha)+4(tan4 alpha)+8cot(8 alpha)=cot(alpha)

If (3 pi)/(4)