If 2tan- - -tan- then prove that - -2tan - -

We have to prove that β #160; =2( tanα #160; tanβ #160; #160; ) #160; 1+tanα #160; tanβ #160; #160; or β #160; +tanα #160; ...

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If 2tanβ +β...

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If $2 tan β + cot β = tan α$ , then prove that $cot β = 2 tan (α - β)$

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2 tan β + cot β = tan α

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