tan20 + tan40 + tan60 +tan80 +.................+ tan160
sunil , 6 Years ago
Grade 12
Trigonometry> tan20 + tan40 + tan60 +tan80 +..............
1 Answers
Tushar
Last Activity: 6 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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