If `alpha=pi/17`, then the value of `(sin21alpha-sinalpha)/(sin16alpha+sin4alpha)` is equal to

If (2 sin alpha)/(1 + cos alpha + sin alpha) = 3/4 , then the value of (1 + cos alpha + sinalpha)/(1 + sin alpha) is equal to

If (2 sin alpha)/(1 + cos alpha + sin alpha) = 3/4 , then the value of (1 - cos alpha + sinalpha)/(1 + sin alpha) is equal to

If tanalpha=2 , then the value of (sinalpha)/(sin^(3)alpha+cos^(3)alpha) is

If alpha in [(pi)/(2),pi] then the value of sqrt(1+ sin alpha)-sqrt(1 - sin alpha) is equal to

If alpha=(pi)/(21) then (sin3 alpha-sin7 alpha)/(sin24 alpha+sin14 alpha)=

If alpha in [pi/2,pi] , then the value of sqrt(1+sin alpha)- sqrt(1-sinalpha) is equal to:

If alpha=(pi)/21 then (sin 3 alpha+sin 7 alpha)/(sin 24 alpha+sin 14 alpha)=

The value of sin^(2)alpha+sin((pi)/(3)-alpha)sin((pi)/(3)+alpha) is