tan20+ tan40+ tan60+ tan80.................... + tan160
tan20+ tan40+ tan60+ tan80.................... + tan160
sunil , 7 Years ago
Grade 12
Trigonometry> tan20+ tan40+ tan60+ tan80..................
1 Answers
Tushar
Last Activity: 7 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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