• Book	Advanced Engineering Mathematics
  Author	Erwin Kreyszig
  Edition	8th Edition

code_begins

x=var('x')
y=function('y',x)
de=diff(y,x,2)+y-sec(x)
desolve(de,y)

code_ends

• Solution by:

  • umesh mishra, <student>, <army institute of technology pune>

  • nitish, <student>, <army institute of technolgy pune>