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The value of (sin2 7 1/2° + cos2 7 1/2°) -(sin2 30° +cos2 30°) + (sin2 7° + sin2 83°) is equal to:(A) 3 (B) 3 1/2 (C) 2 (D) 1 |
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Answer» Correct option (D) 1 Explanation: sin 83° = cos 7° ∴ the given expression is 1 – 1 + 1 = 1. |
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