I need some help with these questions

30.

31. D

37. A and B

38 b and c

39

40

41

30. Find the values of the remaining trigonometric functions of 0 with the given constraint. sec0 = -19 sin 0 > 0 (Exact values.) 31. Use a calculator to evaluate the trigonometric function. Round your answer to 4 decimal places. A. sin 480 B. tan 30 C. sin 3TL D. csc5325'38" 536. Graph one period of the function. Be sure to label key points. A. y = 2 sin (x) B. y = -4 cos (3x) 37. Graph one period of the function. Identify the amplitude, period, phase shift. Be sure to label key points. A. y = -2 sin (2x + 2) B. y = 2 cos (2x - ) C. y = 3 sin (3x - It)38. The number of hours of daylight, H, on day t of any given year in a particular city can be modeled by the function H (t) = 4 sin 365 (t - 78) + 12 A. What is the period of the function? B. How many hours of daylight are there on the longest day of the year? C. How many hours of daylight are there on the shortest day of the year? 39. The tallest television transmitting tower in the world is in North Dakota. From a pointon level ground 1 mile (5280 feet) from the base of the tower, the angle of elevation is 29.9. Estimate the height of the tower to the nearest foot. 40. A twenty-five foot ladder just reaches the top of a house and forms an angle of 41.50 with the wall of the house. How tall is the house? Round your answerto the nearest 0.1 foot. 41. From the top of a 200-ft tall lighthouse, the angle of depression to a ship in the ocean is 23. How far is the ship from the base of the lighthouse? Round answer to nearest tenth of a foot. B A Use the figure to do problems 41 and 42