(\cos^{-1}\(\cos x\)=x) कब सीधे सही माना जा सकता है?

When can (\cos^{-1}\(\cos x\)=x) be directly true?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

A. जब \(x\in[0,\pi]\)When \(x\in[0,\pi]\)

Step 1

Concept

The principal range of \(\cos^{-1}x\) is \([0,\pi]\). Therefore (\cos^{-1}\(\cos x\)=x) applies directly only in this range.

Step 2

Why this answer is correct

The correct answer is A. जब \(x\in[0,\pi]\) / When \(x\in[0,\pi]\). The principal range of \(\cos^{-1}x\) is \([0,\pi]\). Therefore (\cos^{-1}\(\cos x\)=x) applies directly only in this range.

Step 3

Exam Tip

\(\cos^{-1}x\) की प्रधान सीमा \([0,\pi]\) है। इसलिए (\cos^{-1}\(\cos x\)=x) इसी सीमा में सीधे लागू होता है।

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FAQs

Mathematics Answer, Explanation and Revision Hints

(\cos^{-1}\(\cos x\)=x) कब सीधे सही माना जा सकता है? / When can (\cos^{-1}\(\cos x\)=x) be directly true?

Correct Answer: A. जब \(x\in[0,\pi]\) / When \(x\in[0,\pi]\). Explanation: \(\cos^{-1}x\) की प्रधान सीमा \([0,\pi]\) है। इसलिए (\cos^{-1}\(\cos x\)=x) इसी सीमा में सीधे लागू होता है। / The principal range of \(\cos^{-1}x\) is \([0,\pi]\). Therefore (\cos^{-1}\(\cos x\)=x) applies directly only in this range.

Which concept should I revise for this Mathematics MCQ?

The principal range of \(\cos^{-1}x\) is \([0,\pi]\). Therefore (\cos^{-1}\(\cos x\)=x) applies directly only in this range.

What exam hint can help solve this Mathematics question?

\(\cos^{-1}x\) की प्रधान सीमा \([0,\pi]\) है। इसलिए (\cos^{-1}\(\cos x\)=x) इसी सीमा में सीधे लागू होता है।