Prove that: `t a nalpha+2tan2alpha+4tan4alpha+8cot8alpha=cotalpha`

prove that : tan(alpha)+2 tan(2alpha) +4(tan4alpha)+8cot(8alpha) = cot(alpha)

tan alpha + 2 tan 2alpha + 4 tan 4 alpha + 8 cot 8 alpha =

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

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

Statement I tan alpha+2tan 2 alpha+4 tan 4 alpha + 8 tan 8 alpha+16 cot 16 alpha=cot alpha Statement II cot alpha- tan alpha=2 cot 2 alpha

If alpha=[2pi]/7 then tanalphatan2alpha+tan2alphatan4alpha+tan2alphatan4alpha=

If alpha=pi/(14), then the value of (tanalphatan2alpha+tan2alphatan4alpha+tan4alphatanalpha) is 1 (b) 1//2 (c) 2 (d) 1//3

Which of the following identities, wherever defined, hold(s) good? (a)cotalpha-tanalpha=2cot2alpha (b)tan(45^0+alpha)-tan(45^0-alpha)=2cos e c2alpha (c)tan(45^0+alpha)+tan(45^0-alpha)=2sec2alpha (d)tanalpha+cotalpha=2tan2alpha

Prove that: tan^2theta=tan^2alpha ,theta=npi+-alpha,n in Z

tanalpha.tan(60^@-alpha).tan(60^@+alpha)=tan3alpha