Finding the exact value of sin pi/12 using sin2a=2sina*cosA and Sin(a-b)

I suspect that you think that this forum answers problems for student. That is actually the opposite of what is done here. We expect the student to solve their own problems with helpful hints from the forum helpers.

Before we can give you any hints we need to know where you are stuck. So please post back with your work so we can get an idea of what help you need.

For the record if you had followed the guidelines for this forum you would have already received help. Please post back.

Also A and a are NOT the same so please use A or a.
 
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