Solve the following:Show that`sin^2(pi/10)+sin^2((4pi)/10)+sin^2 ((6pi)/10)+sin^2 ((9pi)/10)=2`

sin(pi/10)sin((3pi)/10)=

Prove that: sin^(2) (pi/8) +sin^(2) ((3pi)/8) +sin^(2)((5pi)/8)+sin^(2)((7pi)/8)=2

Prove that sin^2(pi/8)+sin^2(3pi/8)+sin^2(5pi/8)+sin^2(7pi/8)=2

The value of sin^2 (pi/8)+sin^2 ((3pi)/8)+sin^2 ((5pi)/8)+sin^2 ((7pi)/8) is

Solve the following:find the values of sin^2(pi/2)-cos^2(pi/2)+tan^2(pi/2)

Prove that sin^2(pi/4-x)+sin^2(pi/4+x)=1

sin^4\ pi/8 + sin^4\ (3pi)/8 + sin^4\ (5pi)/8 + sin^4\ (7pi)/8=

Prove the following : sin^2 6x-sin^2 4x=sin2xsin10x

Use De moivers theorem and simplify the following. (Cos ((7pi)/13) + i Sin ((7pi)/13))^4 / (Cos ((4pi)/13) - i Sin ((4pi)/13))^6