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cosec(-30°) =___________(a) -2(b) 2(c) 2/√3(d) -2/√3This question was posed to me in an interview for job.The question is from Trigonometric Functions topic in portion Trigonometric Functions of Mathematics – Class 11

Answer»

The CORRECT choice is (a) -2

The EXPLANATION: We KNOW, cosec(-x) = cosec x

So, cosec(-30°) = -cosec 30°=-2.



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