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1+ tan^2x=_______________(a) sec^2x(b) -sec^2x(c) cosec^2x(d) -cosec^2xThe question was asked in an internship interview.Enquiry is from Trigonometric Functions in portion Trigonometric Functions of Mathematics – Class 11

Answer»

The CORRECT CHOICE is (a) sec^2x

The best explanation: We KNOW, sec^2x – tan^2x=1

So, 1+ tan^2x=sec^2x.



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