Concept-wise Practice

standard identities MCQ Questions for Class 11

standard identities 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 standard identities.

\(\sin(2\pi+x)\) किसके बराबर है?

What is \(\sin(2\pi+x)\) equal to?

Explanation opens after your attempt
Correct Answer

A. \(\sin x\)

Explanation

Simple Explanation

साइन फलन का आवर्त \(2\pi\) होता है। इसलिए किसी भी कोण \(x\) में \(2\pi\) जोड़ने पर उसका साइन नहीं बदलता: \(\sin(2\pi+x)=\sin x\)। \(-\sin x\) तब प्राप्त होता है जब कोण में \(\pi\) जोड़ा जाता है, क्योंकि \(\sin(\pi+x)=-\sin x\)। परीक्षा टिप: \(\sin(x+2n\pi)=\sin x\) पहचान याद रखें। / The sine function has period \(2\pi\). Hence, adding \(2\pi\) to any angle \(x\) does not change its sine: \(\sin(2\pi+x)=\sin x\). The value \(-\sin x\) occurs on adding \(\pi\), since \(\sin(\pi+x)=-\sin x\). Exam tip: remember \(\sin(x+2n\pi)=\sin x\).

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