#### Question

If y = e^{ax}. cos bx, then prove that

`(d^2y)/(dx^2)-2ady/dx+(a^2+b^2)y=0`

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Solution for question: If y = e^ax. cos bx, then prove that (d^2y)/(dx^2)-2ady/dx+(a^2+b^2)y=0 concept: Derivatives of Composite Functions - Chain Rule. For the courses CBSE (Arts), CBSE (Commerce), CBSE (Science), HSC Arts, HSC Commerce, HSC Commerce (Marketing and Salesmanship), HSC Science (Computer Science), HSC Science (Electronics), HSC Science (General) , ISC (Arts), ISC (Commerce), ISC (Science), PUC Karnataka Science