Find the sum of the series: `sin^3 (x/3)+3sin^3 (x/3^2)+3^2 sin^3 (x/3^3)+… to n `

Find the sum to n terms of the series sin^3 theta +1/3 sin^3 3theta+1/3^2sin^3 9theta+1/3^3 sin^3 27theta+…

Find the sum oif the series sintheta- (sin2theta)/(2!)+(sin3theta)/(3!)-… to oo

sin ^ (2) x + sin ^ (2) 2x + sin ^ (2) 3x = (3) / (2)

Sum ot n terms the series sin^3theta+sin^3 3theta+sin^3 5 theta+…

Find the sum of the series nC_(0)x^(3n)+(nC_(1))/(2)x^(3(n-1))(3-x^(3))+(nC_(2))/(3)x^(3(n-2))(3-x^(3))^(2)+......+(nC_(n))/(n+1)(3-x^(3))^(n)

(3) int sin^(3)x*sin^(2)x*dx

What is int_0^(pi//2) (sin^3 x)/(sin^3x+cos^3x) dx

Solve sin^(2)x+(1)/(4)sin^(2)3x=sin x sin^(2)3x

Find the sum of sin x+3sin3x+5sin5x+.........+(2k-1)sin(2k-1)x