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" (b) "sin20^(@)sin40^(@)sin80^(@)sin90^...

" (b) "sin20^(@)sin40^(@)sin80^(@)sin90^(@)=(sqrt(3))/(8)

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

sin20^(@)*cos40^(@)+cos20^(@)*sin40^(@)=(sqrt(3))/(2)

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

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

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

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

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

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

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