d) sin K e) cos 2 f) tan 3) Verify each of the following: (Hint: Work with the left side, use properties to expand, then simplify. If you do it correctly, the work on the left will lead to the answers on the right. a) sin(0+60) - cos(0 + 30) = sin 0 b) 2 cos(x) = =COS X + sin x 4) Use a half-angle identity to find the exact value of cos 165 11 5) Use a sum or difference property to find an EXACT value of sin 12