Hellow everyone. Well Ive gt some Hmwrk on polar curve sketching and I've done them. BuT in the book I used there's on answer about them. I'm studying a Distance Education MAths MOdule. Can anyone help me or sugest a software that can display these graphs for me to checK...

well here are the equations:

1. r=4sec [theta]

2. r=3sin[theta]

3. r=3cosec[theta]

4. r[square]=a[square]sin 2[theta]

5. r[square]sin 2[theta]=c[square]

I'll be very glad if someone could really help.. Thanks in advance...