If f(x) = cos² x + sec ² x, then
Enhance your understanding of Trigonometric Functions with these engaging MCQs from Chapter 3 of Class 11 NCERT Mathematics (CBSE 2024-25). This chapter covers key topics such as trigonometric identities, angles, radian and degree measures, domain and range of trigonometric functions, and their applications. These multiple-choice questions are designed to test your knowledge, improve problem-solving skills, and build a strong foundation. Ideal for exam preparation and self-study, these MCQs make learning trigonometry interactive, effective, and enjoyable.
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Choice (a) is correct.
Given that, f(x) = cos² x + sec² x
We know that, A.M ≥ G.M
(cos² x + sec ² x)/2 ≥ √cos² x. sec ² x
⇒ cos² x + sec ² x ≥ 2
⇒ f(x) ≥ 2
This question related to Chapter 3 maths Class 11th NCERT. From the Chapter 3: Trigonometric Functions. Give answer according to your understanding.
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