Concept-wise Practice

tangent identity MCQ Questions for Class 11

tangent identity se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

Practice Questions

1 questions tagged with tangent identity.

(\cos-2 x\(1+\tan^2 x\)) का सरल मान क्या है?

What is the simplified value of (\cos-2 x\(1+\tan^2 x\))?

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Correct Answer

A. \(1\)

Explanation

Simple Explanation

पहचान \(1+\tan^2 x=\sec^2 x\) का प्रयोग करने पर दिया गया व्यंजक \(\cos^2 x\sec^2 x\) बनता है। क्योंकि \(\sec^2 x=1/\cos^2 x\), इसलिए इसका मान \(1\) है। \(\sec^2 x\) केवल कोष्ठक वाले भाग का मान है, पूरे व्यंजक का नहीं। परीक्षा टिप: \(1+\tan^2 x\) दिखते ही इसे \(\sec^2 x\) से बदलें। / Using the identity \(1+\tan^2 x=\sec^2 x\), the expression becomes \(\cos^2 x\sec^2 x\). Since \(\sec^2 x=1/\cos^2 x\), its value is \(1\). \(\sec^2 x\) is only the value of the bracketed part, not of the complete expression. Exam tip: When you see \(1+\tan^2 x\), replace it with \(\sec^2 x\).

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