B. √2/2 / √2/2
ExplanationStep 1: Check the standard angle table. Step 2: cos45° = √2/2. Step 3: Values at 45° are same due to symmetry.
Step 1: Standard angle table देखें। Step 2: cos45° = √2/2 होता है। Step 3: 45° की values symmetry के कारण same होती हैं।
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