Question:medium

Consider the differential equation
\[ y'' - 4y' + 20y = 0 \] with $y\left(\frac{\pi}{2}\right) = 0$, and $y'\left(\frac{\pi}{2}\right) = 1$, then the value of $y\left(\frac{\pi}{8}\right)$ is

Show Hint

Always double check the angle evaluated in trig functions! At $x = \pi/8$, $4x = \pi/2$, which simplifies $\sin(4x) = 1$. This eliminates trigonometric factors cleanly!
Updated On: Jul 29, 2026
  • $-\frac{1}{4} e^{-3\pi/8}$
  • $-\frac{1}{4} e^{3\pi/8}$
  • $-\frac{1}{4} e^{3\pi/4}$
  • $-\frac{1}{4} e^{-3\pi/4}$
Show Solution

The Correct Option is D

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