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(sin 65^(@) + sin 25^(@))/( cos 65^(@) +...

`(sin 65^(@) + sin 25^(@))/( cos 65^(@) + cos 25^(@))= `

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cos 25^(@) - cos65^(@) =

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Prove that, (cos 20^(@) + sin 20^(@))/(cos 20^(@) - sin 20^(@)) = tan 65^(@)

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