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Question
x4 − 2 sin x + 3 cos x
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Solution
\[\frac{d}{dx}\left( x^4 - 2 \sin x + 3 \cos x \right)\]
\[ = \frac{d}{dx}\left( x^4 \right) - 2\frac{d}{dx}\left( \sin x \right) + 3\frac{d}{dx}\left( \cos x \right)\]
\[ = 4 x^3 - 2 \cos x - 3 \sin x\]
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