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" 3.Prove that "cos80^(@)+cos40^(@)-cos2...

" 3.Prove that "cos80^(@)+cos40^(@)-cos20^(@)=0

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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^(@)cos80^(@)=1/8

Prove that cos 80^(@) cos40^(@)+cos40^(@) cos200^(@) +cos200^(@) cos 80^(@) = -3/4

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

cos80 ^ (0) + cos40 ^ (@) - cos20 ^ (@) = 0

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

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

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