Trignometry Problem & Vidya Mandir Package Plz ..Help?

Question

tanA/tanB = 3:2 Prove that

tan(A-B) = sin 2B/5-cos2B

How many terms are common to the 2 APs

3,7,11 .....407

2,9,16......709

Friends ..I wanted to know from where I could get Vidya Mandir Package for Class 10 , IF there is any Ebook available plz. send them to me yaar ..

Thanking You in Antiicpation...

Answer 1

I did my homework years ago, I don't want to do yours.

Answer 2

>>SLAMMING HEAD ON DESK IN DISGUST<<

Man yahoo answers has GOT to fix this glitch.  

Answer 3

Um, we don't know that!

Answer 4

uhh this isnt abouthockey plzz stop