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