Book
Advanced Engineering Mathematics
Author
Erwin Kreyszig
Edition
8th Edition
x=var('x')
y=function('y',x)
de=diff(y,x,2)+y-sec(x)
desolve(de,y)
Solution by:
umesh mishra, <student>, <army institute of technology pune>
nitish, <student>, <army institute of technolgy pune>