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tan20 + tan40 + tan60 +tan80 +.................+ tan160

tan20 + tan40 + tan60 +tan80 +.................+ tan160

Grade:12

1 Answers

Tushar
115 Points
3 years ago
Hello friend. You know that tan(π-x)=-tanx. Applying it here we get tan20=-tan160... tan40=-tan140 and so on.. all the factors will cancel out and answer would be zero.

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