B. 1 / 1
ExplanationStep 1: Standard values are sin30° = 1/2 and cos60° = 1/2. Step 2: Adding both gives 1. Step 3: Memorize the standard angle table well.
Step 1: Standard values sin30° = 1/2 और cos60° = 1/2 हैं। Step 2: दोनों को जोड़ने पर 1 मिलता है। Step 3: Standard angle table को अच्छी तरह याद रखें।
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