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Omer Bechtelar

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โˆ™ 3y ago
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โˆ™ 14y ago

2 cos2(x) - sin(x) - 1

= 2 (1 - sin2(x)) - sin(x) - 1

= 2 - 2 sin2(x) - sin(x) - 1

= -2 sin2(x) - sin(x) +1

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Q: What is 2 cos squared x - sinx - 1?
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