B. 1
ExplanationStep 1: cot θ is reciprocal of tan θ. Step 2: tan45° = 1 so cot45° is also 1. Step 3: At 45° sin and cos are equal.
Step 1: cot θ tan θ का reciprocal होता है। Step 2: tan45° = 1 इसलिए cot45° भी 1 है। Step 3: 45° पर sin और cos बराबर होते हैं।
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