Math, asked by Tanmoy4042, 1 year ago

prove that, tan70=2tan50+tan20

Answers

Answered by sandy1816

4

Step-by-step explanation:

tan70=tan(50+20)

tan70=tan50+tan20/1-tan50tan20

tan70-tan70tan50tan20=tan50+tan20

tan70-tan(90-20)tan50tan20=tan50+

tan20

tan70-cot50tan20tan50=tan50+tan20

tan70-tan20=tan50+tan20

tan70=2tan50+tan20

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