" (3) "5" in "20^(@)" sin "40^(@)" since sing "0=(3)/(16)

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

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

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

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

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

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

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

Prove that sin 20^@ sin 40^@ sin 60^@ sin 80^@=3/16 .

Prove that: "sin"(pi)/(5)"sin"(2pi)/(5)"sin"(3pi)/(5)"sin"(4pi)/(5)=(5)/(16) "sin"36^(@) "sin"72^(@) "sin"108^(@) sin 144^(@)=(5)/(16) .

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