Math, asked by raghavneha, 11 months ago

tan80° =tan10° + tan70°

Answers

Answered by Johnsamuel

1

Here is the proof

LHS

tan 80 =tan(10+70)

tan 80= tan 10+ tan 70/1-tan 10 tan 70

tan 80 - tan 80 tan 10 tan 70=tan 10+ tan 70

tan 80= tan 10+ tan 70+ tan 80 tan 10 tan 70

tan 80= tan 10+ tan 70

Hence proved

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