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What is the value of tan 48°?(a) Cot 42°(b) Tan 42°(c) Tan 16°(d) Cot 16°This question was posed to me by my college director while I was bunking the class.This is a very interesting question from Trigonometric Ratios of Complementary Angles topic in division Trigonometry of Mathematics – Class 10

Answer»

Correct CHOICE is (a) COT 42°

Best EXPLANATION: All trigonometric ratios are positive in the first quadrant and tan CHANGES to cot when it is 90° or 270°.

Tan 48° = Tan (90° – 42°)

= Cot 42°



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