# math

posted by
**Aliya**
.

1. Prove the identity:cosx/1-tanx+sinx/1-cotx=sinx+cosx

2.Prove the identity: cosx/1+sinx+1+sinx/cosx=2secx

posted by
**Aliya**
.

1. Prove the identity:cosx/1-tanx+sinx/1-cotx=sinx+cosx

2.Prove the identity: cosx/1+sinx+1+sinx/cosx=2secx