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What is (\frac{1-\cos x}{1+\cos x}) equal to?(\frac{1-\cos x}{1+\cos x}) किसके बराबर है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (\tan^2 \frac{x}{2})(\tan^2 \frac{x}{2})
By the half-angle identity, (\tan^2 \frac{x}{2}=\frac{1-\cos x}{1+\cos x}). Remember half-angle forms separately.अर्ध कोण पहचान के अनुसार (\tan^2 \frac{x}{2}=\frac{1-\cos x}{1+\cos x})। अर्ध कोण रूपों को अलग से याद रखें।
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