B. cot²θ / cot²θ
ExplanationStep 1: The identity is 1 + cot²θ = cosec²θ. Step 2: Rearranging gives cosec²θ - 1 = cot²θ. Step 3: Remember cosec and cot identity together.
Step 1: Identity 1 + cot²θ = cosec²θ होती है। Step 2: इसे rearrange करने पर cosec²θ - 1 = cot²θ मिलता है। Step 3: cosec और cot वाली identity साथ याद रखें।
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