I need help with these questions

Find the exact value of tan(A+B) and tan (A-B) for each given pair of values. 1. A= 180 and B=30 2. A= 180 and B = 45 3. A= 120 and B = 30 4. A= 120 and B = 45In 3-8, for each value of 0, use double-angle formulas to find a. sin 20. b. cos 20, c. tan 20 3. 0 = 30 4. 0 = 2250 5. 0 = 330 6. 0 = # 7. 0 = 10 8. 0 =21