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cos (-60°) = ________________(a) -√3/2(b) 1/2(c) √3/2(d) -1/2The question was asked in an interview for job.I'd like to ask this question from Trigonometric Functions in chapter Trigonometric Functions of Mathematics – Class 11 |
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Answer» CORRECT option is (B) 1/2 The best explanation: We know, cos (-X) = cos x So, cos(-60°) = cos 60°=1/2. |
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