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

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

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

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

If n=pi/(4alpha), then tanalpha tan 2alpha tan 3 alpha........tan(2n-1)alpha is equal to

The value of (sin(pi-alpha))/(sin alpha-cos alpha tan.(alpha)/(2))-cos alpha is

For alpha=pi/7 which of the following hold(s) good? (a) tanalphatan2alphatan3alpha=tan3alpha-tan2alpha-tanalpha (b) cos e calpha=cos e c2alpha+cos e c4alpha (c) cosalpha-cos2alpha+cos3alpha=1/2 (d) 8cosalphacos2alphacos4alpha=1

Prove that sin4 alpha=4tan alpha (1- tan^(2)alpha)/((1+tan^2 alpha)^2

If alpha in (-(pi)/(2), 0) , then find the value of tan^(-1) (cot alpha) - cot^(-1) (tan alpha)

Prove that sin 4alpha = 4 tan alpha (1 - tan^(2) alpha)/((1 + tan^(2) alpha)^(2))

If sin theta = 3 sin ( theta + 2 alpha) , then the value of tan (theta + alpha ) + 2 tan alpha is