Solve the differential equation 
2
1(
0)
x
e
y
dx
x
dy
x
x
⎡−
⎤
−
=
≠
⎢
⎥
⎣
⎦ 13 Find a particular solution of the differential equation 
cot
dy
y
x
dx +
 = 4x cosec x
(x ≠ 0), given that y = 0 when 
2
x
=π 14