Question 1098093

Use sum and difference identities to find the exact value of sin 15 degrees (two angles given are 45 degrees and 60 degrees.)
<pre>sin (A - B) = sin A cos B - cos A sin B
sin (60 - 45) = sin 60 cos 45 - cos 60 sin 45
If you don't know these ratios, you need to look them up on the UNIT CIRCLE chart!