sin20^(@)sin40^(@)sin60^(@)sin80^(@)

Prove that: sin20^(@)sin40^(0)sin60^(@)sin80^(@)=(3)/(16)

Prove that: sin20^(0)sin40^(0)sin60^(@)sin80^(@)=(3)/(16)

sin20^(0)sin40^(0)sin60^(0)sin80^(@)=(3)/(16)

sin20^(@)+sin40^(@)-sin80^(@)=

Prove that sin 20 ^(@) sin40^(@) sin 60^(@) sin 80^(@) = 3/16

sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)=sin70^(@)+sin80^(@)

Prove that sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)=sin70^(@)+sin80^(@) .

sin10^(@)+sin20^(@)+sin40^(@)+sin50^(@)-sin70^(@)-sin80^(@)=

Let P=sin 25^(@) sin 35^(@)sin 60^(@) sin 85^(@) and Q=sin20^(@)sin40^(@)sin 75^(@) sin 80^(@) . Which of the following relation (s) is (are) correct ?

Let P=sin 25^(@) sin 35^(@)sin 60^(@) sin 85^(@) and Q=sin20^(@)sin40^(@)sin 75^(@) sin 80^(@) . Which of the following relation (s) is (are) correct ?