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[+21.sin20^(@)sin40^(@)sin60^(@)sin80^(@...

[+21.sin20^(@)sin40^(@)sin60^(@)sin80^(@)=],[[" (A) "(-3)/(16)," (B) ",(5)/(16)],[" (C) "(3)/(16)," (D) ",(-5)/(16)]]

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

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

sin 20^(@) sin 40^(@) sin 60^(@) sin 80^(@) = .............. A) (-3)/(16) B) (5)/(16) C) (3)/(16) D) (-5)/(16)

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

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

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

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

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

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

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