B. 1/2 / 1/2
ExplanationStep 1: sec θ is reciprocal of cos θ. Step 2: If sec θ = 2 then cos θ = 1/2. Step 3: Remember reciprocal ratios in pairs.
Step 1: sec θ cos θ का reciprocal होता है। Step 2: sec θ = 2 होने पर cos θ = 1/2। Step 3: Reciprocal ratios को जोड़ी में याद करें।
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