PART 9：例題:-積化和差(求不定積分) \(\int {\sin 5x\cos 3x\;dx} \) SOL： (利用積化和差拆開) \(\int {\sin 5x\cos 3x\;dx} \) \( = \frac{1}{2}\int {(\sin 8x + \sin 2x)\;dx} \) \( = \frac{1}{2}\left[ { - \frac{1}{8}\cos 8x - \frac{1}{2}\cos 2x} \right] + C\)
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PART 9：例題:-積化和差(求不定積分) \(\int {\sin 5x\cos 3x\;dx} \) SOL： (利用積化和差拆開) \(\int {\sin 5x\cos 3x\;dx} \) \( = \frac{1}{2}\int {(\sin 8x + \sin 2x)\;dx} \) \( = \frac{1}{2}\left[ { - \frac{1}{8}\cos 8x - \frac{1}{2}\cos 2x} \right] + C\)
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