cos
dy
a
⎛dx
⎞ =
⎜
⎟
⎝
⎠
 (a ∈ R); y = 2 when x = 0
14 tan
dy
y
x
dx =
; y = 1 when x = 0
15 Find the equation of a curve passing through the point (0, 0) and whose differential
equation is y′ = ex sin x 16