The sum of the series `sinalpha+xsin(alpha+beta)+x^2/(2!)sin(alpha+2beta) +.....oo` is

Find the sum of the series cosalpha+x cos(alpha+beta)+ x^2/(2!)cos(alpha+2beta)+…to oo

Find the sum of the series sinalpha+sin(alpha+beta)+sin(alpha+2beta)+sin(alpha+3beta)+.....+sin(alpha+(n-1)beta)

Sum the infinite series : sinalpha+x sin (alpha+beta)+ x^2/(2!)sin(alpha+2beta)+x^3/(3!) sin (alpha+3beta)+..

Find the sum of the series sin^2alpha+sin^2(alpha+beta)+sin^2(alpha+2beta)…+sin^2(alpha +(n-1) beta)

Sum of n terms of the series sinalpha-sin(alpha+beta)+sin(alpha+2beta)-sin(alpha+3beta)+….

Find the sum to n terms o the series cos^2 alpha+cos^2(alpha+beta)+cos^2(alpha+2beta)+..

sinalpha=(1)/(2) cos beta=(1)/(2) then alpha+beta=

Find the sum of the infinite series, sinalpha+1/2 sin2alpha+1/2^2sin3alpha+1/2^3sin4alpha+.......oo.

(cos alpha + cos beta) ^ (2) + (sin alpha + sin beta) ^ (2) =