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sec(-45°) =_____________(a) 1(b) -1(c) √2(d) -√2This question was addressed to me during a job interview.The doubt is from Trigonometric Functions topic in portion Trigonometric Functions of Mathematics – Class 11

Answer»

Right option is (C) √2

The best explanation: We KNOW, sec(-x) = sec x

So, sec(-45°)=sec 45°=1/(cos 45°)=√2.



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