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

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

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

For A in R , prove that sin20^(@)sin40^(@)sin60^(@)sin80^(@)=3/16

Prove that sinthetasin(60^(@)+theta)sin(60^(@)-theta)=1/4sin3theta Hence deduce that sin20^(@)sin40^(@)sin60^(@)sin80^(@)=3//16 (OCT-97,INST.93)

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

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 ?

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 ?

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