Question

What is the value of sec 60° – \( \frac {1}{cosec \, 90^{\circ }}\)?

(a) Cot 30°

(b) Cot 45°

(c) Cot 60°

(d) Tan 60°

The question was asked during an internship interview.

This question is from Trigonometric Ratios of  Specific Angles topic in chapter Trigonometry of Mathematics – Class 10

Answer 1

Right choice is (b) Cot 45°

Explanation: sec 60° – \( \frac {1}{cosec \, 90^{\circ }}\) = 2 – \( \frac {1}{1}\)

= 1

= cot 45°