Verify identity and solve: 1 - sin (-u) / cos u + cos (-u) / 1 + sin = 2 sec u

[baseballboy]

Help to Solve the following:
1 - sin (-u) / cos u + cos (-u) / 1 + sin = 2 sec u

 

[stapel]

Verify identity and solve:
Help to Solve the following:
1 - sin (-u) / cos u + cos (-u) / 1 + sin = 2 sec u

Well, which is it? Are you verifying an identity (something which will be true for all values of "u") or solving an equation (which will be true only for limited and specific values of "u")?

When you reply, please include a clear listing of your efforts so far, so we can see where things are bogging down. Thank you!