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Which trigonometric ratios are positive in the fourth quadrant?

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in Mathematics - Class 10 by (506k points)
Which trigonometric ratios are positive in the fourth quadrant?

(a) Cos, Sin

(b) Sec, Cos

(c) Sin, Cot

(d) Tan, Cot

The question was asked in a job interview.

This key question is from Trigonometric Ratios of Complementary Angles in section Trigonometry of Mathematics – Class 10

1 Answer

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Best answer
The correct answer is (b) Sec, Cos

The best I can explain: A plane is divided into four infinite quadrants. The trigonometric ratios that are positive in the fourth quadrant are secant, cosine and the rest of all trigonometric ratios are negative in this quadrant.

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