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

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

Grade:12

1 Answers

Tushar
115 Points
4 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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