Prove that :`sin 10^(@) + sin 20^(@) + sin 40^(@) + sin 50^(@) = sin 70^(@) + sin 80^(@).`

Prove that sin10^(@) sin 30^(@) sin 50^(@) sin 70^(@)=1/16

sin 10 ^(@) sin 50^(@) sin 70^(@) = (1)/(8).

Prove that sin 20^(@) sin 40^(@) sin 80^(@) = (sqrt3)/(8).

The value of sin 10^(@) sin 30^(@) sin 50^(@) sin 70^(@) is equal to .

Prove that sin 12^(@) sin18^(@)sin42^(@) sin48^(@) sin 72^(@) sin78^(@)=(cos18^(@))/(32) .

Prove that 4(cos ^(3) 10^(@) + sin ^(3) 20^(@)) = 3 ( cos 10^(@) + sin 20^(@)).

Prove that sin 10° + sin 20° + sin 40° + sin 50°=sin 70° + sin 80

Prove that: i) sin20^(@)sin40^(@)sin60^(@)sin80^(@)=3/16 ii) sin10^(@)sin50^(@)sin60^(@)sin70^(@)=sqrt(3)/16 iii) sin20^(@)sin40^(@)sin80^(@)=sqrt(3)/8

Prove that sin20^(@)sin40^(@)sin80^(@)=(sqrt(3))/(8)

The value of sin50^(@)-sin70^(@)+sin10^(@) is