C. tan²θ / tan²θ
ExplanationStep 1: The identity is 1 + tan²θ = sec²θ. Step 2: Rearranging gives sec²θ - 1 = tan²θ. Step 3: Remember sec and tan identity together.
Step 1: Identity 1 + tan²θ = sec²θ होती है। Step 2: इसे rearrange करने पर sec²θ - 1 = tan²θ मिलता है। Step 3: sec और tan वाली identity साथ याद रखें।
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