Hi,

I've asked for a list of questions from a teacher to do over the holidays. I'm struggling to use the text book to help me.

Could someone provide HOW to do these questions, as I just want to get an idea of what I'm getting next year.

Thanks.

3. Evaluate $\displaystyle P=sin6°sin42°sin66°sin78°$

4. Use the formula $\displaystyle tan2x = (2tanx)/(1-tan^2 x)$ to find a surd expression for $\displaystyle tan(pi/8)$