Question

How do I solve the exact value of sin(pi/12) using addition/subtraction identities?

Answer 1

Dear Animal Lover,
Note that Pi/12 is the same as Pi/3 - Pi/4. Why not check this out?

It's easy (or should be) to find the sine and cosine of PI/3 and Pi/4.
The difference formula for sin (a-b) is sin a sin b - cos a cos b.

Try putting this info together to obtain sin (Pi/12). Good luck!