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सिद्ध कीजिए की cos 20^(@) cos 40^(@) c...

सिद्ध कीजिए की
` cos 20^(@) cos 40^(@) cos 60^(@) cos 80^(@) =(1)/( 16)`

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cos 20^(@) cos 40^(@) cos 80^(@)=

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

cos20^(@)cos40^(@)cos60^(@)cos80^(@)=

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

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

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

cos20^(@).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^(@)cos60^(@)cos80^(@)=(1)/(16)