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प्रश्न
The value of 1 – 2 sin2 45° is:
विकल्प
1
`1/2`
`1/4`
0
MCQ
उत्तर
0
Explanation:
1 – 2 sin2 45°
= cos(2 × 45°) [∵ cos 2A = 1 – 2 sin2 A]
= cos 90°
= 0
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Trigonometric Ratios of Compound Angles
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