Asked by  | 21st Jun, 2008, 02:49: PM

Expert Answer:

For derivations please refer to a text book.

If there is some step that you are unable to understand, please let us know,  we will be glad to explain that to you.

Answered by  | 21st Jun, 2008, 02:59: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.