यदि \(f:\mathbb{R}\to\mathbb{R}\), (f(x)=\sin x), तो (f) एकैकी क्यों नहीं है?
If \(f:\mathbb{R}\to\mathbb{R}\), (f(x)=\sin x), why is (f) not one-one?
Explanation opens after your attempt
A. क्योंकि (f(0)=f\(\pi\))Because (f(0)=f\(\pi\))
Concept
त्रिकोणमितीय फलन आवर्ती होते हैं। / Trigonometric functions are periodic.
Why this answer is correct
\(\sin 0=0\) और \(\sin \pi=0\), जबकि \(0\ne \pi\)। / \(\sin 0=0\) and \(\sin \pi=0\), while \(0\ne \pi\).
Exam Tip
आवर्ती फलन को पूरे वास्तविक क्षेत्र पर सामान्यतः एकैकी नहीं माना जाता। / Periodic functions are generally not one-one on the entire real domain.
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