Hi guys,

Found this site through google, looks great

Anyway, I've just finished my maths degree and am training to be a teacher at the moment. My plan is to teach up to further maths at A-level (UK), so as such I'm going over a lot of the stuff I haven't really looked at since my first undergraduate year. I'm rather embarrassingly stumped on a question, and I know the answer is staring me right in the face, if you guys could point me in the right direction it would be great, thanks

Write

in it's simplest form. Use it to evaluate

The first part evaluates to 1, which means I can write

but then I find I'm a bit stuck, the next step would be muchly appreciated

Kind Regards

Stonehambey