Prove that tan70^(@)=cot70^(@)+2cot40^(@...

Prove that `tan70^(@)=cot70^(@)+2cot40^(@)`

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Prove that tan 70^(@)=cot70^(@)+2cot40^(@)

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Prove that tan 70^(@)=cot70^(@)++2cot40^(@)

Prove that: tan70^(@)=tan20^(@)+2tan50^(@)

cot70^(@)+4cos70^(@)

Prove that tan70^(@)=2tan50^(@)+tan20^(@)

Prove that tan70^(@)-tan20^(@)=2tan50^(@) .

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