A. sec²θ / sec²θ
ExplanationStep 1: This is a Pythagorean trigonometric identity. Step 2: 1 + tan²θ = sec²θ. Step 3: Remember tan and sec identity together.
Step 1: यह Pythagorean trigonometric identity है। Step 2: 1 + tan²θ = sec²θ होता है। Step 3: tan और sec वाली identity को साथ याद रखें।
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