" Q27.Frove that "cos20^(@)cos40^(@)cos6...

" Q27.Frove that "cos20^(@)cos40^(@)cos60^(@)cos80^(@)=(1)/(16)

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Prove that cos20^(@)cos40^(@)cos60^(@)cos80^(@)=(1)/(16)

Prove that cos 20^(@)cos40^(@)cos60^(@)cos80^(@)=(1)/(16)

Prove that :cos20^(@)cos40^(@)cos60^(@)cos80^(@)=(1)/(16)

Prove that: cos20^(@)cos40^(@)cos60^(@)cos80^(@)=(1)/(16)

Prove that: cos20^(@)cos40^(@)cos80^(@)=1/8

Prove that: cos20^(@)cos40^(@)cos80^(@)=1/8

Prove that : cos20^(@)cos40^(@)cos80^(@)=1/8

Prove that, cos20^@cos40^@cos60^@cos80^@=1/16

cos20^(@).cos40^(@).cos60^(@).cos80^(@) is :

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