What do you have so far for the first one?

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- December 9th 2012, 06:45 AMMarkFLRe: simplify and proof that answer is this
What do you have so far for the first one?

- December 9th 2012, 07:43 AMtautvyduksRe: simplify and proof that answer is this
i dont know what to do with 1/2 sin (alpha) how to simplify it with

- December 9th 2012, 08:32 AMtopsquarkRe: simplify and proof that answer is this
- December 9th 2012, 01:18 PMchris541125Re: simplify and proof that answer is this
What is the answer to problem 1? Is it 0.8660Cosa?

- December 9th 2012, 02:26 PMtopsquarkRe: simplify and proof that answer is this
You need to simplify

I gave you a way to expand out the

When you do so you will see what to do with the sin(a) term.

I think your biggest problem is that you are using a calculator. Put it away. If you work with exact answers you will easily see what to do.

So again I ask you: What are

and

-Dan