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5sin(30x) - cos(60x) = -2.5​
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5sin(30x) - cos(60x) = -2.5​

User ZZB
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1 Answer

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Explanation:

*remark*

cos 2x = 1-2sin²x

5sin(30x) - cos(60x) = -2.5​-example-1
User Adrian Roworth
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