[3]quad cos20quad *cos40^(@)*cos80^(@)],...

[3]quad cos20quad cos40^(@)cos80^(@)],[:.]

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

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

cos20^@cos40^@cos80^@=

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

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

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

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

Prove that cos 20^(@) cos 40^(@) cos 80^(@)=1/8

Prove that cos 20^(@) cos 40^(@) cos 80^(@)=1/8

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[3]quad cos20quad *cos40^(@)*cos80^(@)],[:.]
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