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[21.sin20^(@)sin40^(@)sin60^(@)=],[[" (a...

[21.sin20^(@)sin40^(@)sin60^(@)=],[[" (a) "(5)/(2)," (b) "(5)/(4)," (c) "(bar(3))/(8)," (d) "(5)/(16)]]

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

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

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

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

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

sin20sin40sin80

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

Prove that,sin20^(@)sin40^(@)sin80^(@)=(sqrt(3))/(8)

Prove that sin20^(@)sin40^(@)sin80^(@)=(sqrt(3))/(8)