Solve the following differential equation(adsbygoogle = window.adsbygoogle || []).push({});

[tex]y\prime=\cos(x+y)[/tex]

Here introduce the new variable:

[tex]x+y\equiv{u}[/tex]

Please show steps, or else I won't understand this

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Differential Equations

**Physics Forums | Science Articles, Homework Help, Discussion**