# Math Help - homework question

1. ## homework question

Hi all from the above , I can`t work out how

a) the length sin 30degress = 1/2

b) the length of cos 30 degress = sq root 3/2

am I missing somthing very simple?

Dave

2. ## Re: homework question

are you familiar with the side ratios of a 30-60-90 right triangle?

3. ## Re: homework question

thanks, your reply has made sense...thanks