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What is (\frac{\sin x}{1-\cos x}) equal to?(\frac{\sin x}{1-\cos x}) किसके बराबर है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (\cot \frac{x}{2})(\cot \frac{x}{2})
By the half-angle identity, (\frac{\sin x}{1-\cos x}=\cot \frac{x}{2}). In such forms, identify the denominator carefully.अर्ध-कोण पहचान से (\frac{\sin x}{1-\cos x}=\cot \frac{x}{2}) होता है। ऐसे रूपों में हर देखकर पहचान करें।
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