If \( y=e^{a x} \cos b x \), show that \( \frac{d^{2} y}{d x^{2}}-2 a \frac{d y}{d x}+\left(a^{2... VIDEO
If \( y=e^{a x} \cos b x \), show that \( \frac{d^{2} y}{d x^{2}}-2 a \frac{d y}{d x}+\left(a^{2}+b^{2}\right) y=0 \).https://bit.ly/YTAI_PWAP https://www.pw.live
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