A. cos²θ / cos²θ
ExplanationStep 1: Basic identity is sin²θ + cos²θ = 1. Step 2: Rearranging gives 1 - sin²θ = cos²θ. Step 3: Memorize the Pythagorean identity well.
Step 1: Basic identity sin²θ + cos²θ = 1 है। Step 2: Rearrange करने पर 1 - sin²θ = cos²θ मिलता है। Step 3: Pythagorean identity को अच्छी तरह याद रखें।
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