Math, asked by rianabri7n0ygj, 1 year ago

Prove that:-tan20. tan30. tan40. tan80=1

Answers

Answered by tssuyambulingam

22

tan20.tan30.tan40.tan80=1
sec70.tan30.sec50.tan80
sec70*1/sec70=1
similarly for the nxt step
sec50*1/sec50=1

therefore, 1*1=1

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