Hi all,

I have an exam tomorrow but the questions which will come up I have never come across before. Some of the questions involve the Factor Formulae which I have never seen before so I was wondering whether you might give some examples and perhaps links to other pages where I can take a long revision.

1. Using the factor formulae evaluate the integrals of the type (sinx cos3x)dx

2. Use the factor formulae to prove trig identities.

I have a general understanding of Trigonometry and I have just completed my Calculus.

We've just been told today about this exam and I have no idea how the factor formulae looks like and how to use it.

Thanks.