i need help with these questions

In 3-8, for each value of 0. use half-angle formulas to find a. sin 40 b. cos 40 c. tan 30. Show all work. 3. 0 = 480 4. 0 = 120 5.0 = 300 6.0 = 20 7.0 = 4 8.0= 4 Graph the direction based on the compass direction. 1) 100 2) 200 3) 270 4) 300 5) Northeast 6) Northwest 7) Southeast 8) Southwest