\(cos \theta\) सम फलन है इसलिए \(cos(-\theta)=\cos \theta\)। सम फलन में ऋण चिह्न से मान नहीं बदलता। / \(cos \theta\) is an even function, so \(cos(-\theta)=\cos \theta\). In an even function, the negative sign does not change the value.
Mathematics Answer, Explanation and Revision Hints
\(cos(-\theta)\) किसके बराबर होता है? / What is \(cos(-\theta)\) equal to?
Correct Answer: C. \(cos \theta\). Explanation: \(cos \theta\) सम फलन है इसलिए \(cos(-\theta)=\cos \theta\)। सम फलन में ऋण चिह्न से मान नहीं बदलता। / \(cos \theta\) is an even function, so \(cos(-\theta)=\cos \theta\). In an even function, the negative sign does not change the value.
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