Word Count : 92

---

The complementary (homogeneous) equation $y''+y=0$ has solutions $y_1=\cos x,\;y_2=\sin x$, so $y_c=C_1\cos x+C_2\sin x$. Use ________ _____ ____ ____ _____ ______ _________ ______.
______ ___ ___ ___ ____ __________ _________ ___ ___.
____ ____ __________ ________ ___ ___ _________ ________ _____ ____ _______ _______.
______ _________ ________ ____ ___ ________ __________ _________ ______ ___ ________.
_________ _______ ________ _______ _______ __________ _______ ______ _______.
________ ___ _____ ______ ______ ______ ___ ______.
__________ ___ ____ ________ _______ _______ ____ _____ ________ ________ ___ ________.
_________ _______ ____ ___ _________ ________ ____ ________.
Get Full Answer on WhatsApp