Henoch M.
asked 10/15/21Help with this homework
The differential equation dy/dx = cos(x + y)/cos(x − y) may be classified as :
a. Homogeneous
b. Exact
c. Linear
d. Exact and Homogeneous
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1 Expert Answer

Yefim S. answered 10/15/21
Tutor
5
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Math Tutor with Experience
cos(x + y)dx - cos(x - y)dy = 0
This is nonlinear equation
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Juma C.
It's homogeneous because it's of the form dy/dx = f(x,y)/d(x,y). it's not exact because it fails the test dP/dy=dQ/dx.10/15/21