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lazy

  • 2 years ago

cos 2x - cos x = 0

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  1. swissgirl
    • 2 years ago
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    hmmm is it \(\cos(2x)\) or \( \cos^2(x)\)

  2. Abhishek619
    • 2 years ago
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    use \[\cos2x= 2 \cos ^{2}x-1\]

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