[27.sin20^(@)sin40^(@)sin60^(@)sin80^(@)=],[A l4],[CO18]

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

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

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

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

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

sin^(3)20^(@)+sin^(3)40^(@)-sin^(3)80^(@)=

sin 20^(@) sin 40^(@) sin 60^(@) sin 80^(@) =(3)/(16)

sin 20^(@) * sin 40^(@) * sin 60^@ * sin 80^(@) =

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

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