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tan 1560°=_________________(a) -√3(b) √3(c) 1/√3(d) -1/√3This question was posed to me in semester exam.This interesting question is from Trigonometric Functions in portion Trigonometric Functions of Mathematics – Class 11

Answer» RIGHT CHOICE is (a) -√3

To explain: TAN 1560° = tan (360°*4 + 120°) = tan 120° {tan (2nπ+X) = tan x}

= tan (180°-60°) = -tan 60° = – √3. {tan π-x = – tan x}


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