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What is the value of cos A sec A + sin A cosec A – tan A cot A?(a) 0(b) 2(c) 1(d) 3I got this question in an interview for internship.This interesting question is from Trigonometric Ratios topic in chapter Trigonometry of Mathematics – Class 10

Answer»

Correct option is (C) 1

To EXPLAIN I would say: Cos A SEC A = 1

Similarly sin A COSEC A = 1 and tan A cot A = 1

∴ cos A sec A + sin A cosec A – tan A cot A = 1 + 1 – 1 = 1



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