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y = sin x + cos x, find its derivative. |
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Answer» y = sin x + cos x The derivative of y is \(\frac{dy}{d\mathrm x}\) = \(\frac{d}{d\mathrm x}\)(sin x + cos x) \(=\frac{d}{d\mathrm x}\)sin x + \(\frac{d}{d\mathrm x}\)cos x = cos x – sin x |
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