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Which identity is correct for \(\cos^{-1}(-x)\)?\(\cos^{-1}(-x)\) के लिए सही identity कौन-सी है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (\pi-\cos^{-1}x)(\pi-\cos^{-1}x)
\(\cos^{-1}(-x)=\pi-\cos^{-1}x\) because the output remains in \([0,\pi]\). Do not treat it as an odd function.\(\cos^{-1}(-x)=\pi-\cos^{-1}x\) क्योंकि output \([0,\pi]\) में रहता है। इसे odd function न समझें।
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