Prove that if #y= sinx/x#, show that #(d^2y)/(dx^2) + 2/x dy/dx + y = 0# ?
1 Answer
May 13, 2018
See below
Explanation:
If

# y + xy' = cos x qquad qquad qquad square# 
#y' + y' + x y'' =  sin x qquad triangle#
As

#(2y')/x + y'' + cos x =  y + cos x# 
#implies y'' + (2y')/x + y = 0 #