OD. I 36. Express 1-2 sin2 380 as a function of twice the given angle. A. COS 760 B. sin 76 O c. - sin 76 O D. -COS 76 https://theorem.nebraska.edu/courses/MTHH044059/unit-3/unit-3-evaluation 16/20 7/7/2021 Precalculus: Trigonometry - Theorem 37. Express sin 18 cos 180 as a function of twice the given angle. A. sin 360 O B. - COS 360 O c. 1 sin 360 O D. COS 36 38. Express - sin 620 1 + cos 67% as a function of half the given angle. O A. -1 tan 310 B. tan 310 O c. tan 310 O D. - tan 310 39. Express 1 + cos 240 as a function of half the given angle. A. 2 cos2 480 B. 2 COS2 12 O C. 4 cos2 48 O D. 4 COS212 40. Use the half-angle formulas to find the exact values. sin 67 30' = O A. V2- V2 O B. V2+ VZ O c. V2 + VZ 2 O D. 2- VZ https://theorem.nebraska.edu/courses/MTHH044059/unit-3/unit-3-evaluation 17/20 7/7/2021 Precalculus: Trigonometry - Theorem 41. Use the half-angle formulas to find the exact values. cos 67 30' = O A. V2 - VZ O B. V2 + V2 2 O c. V 2 + V2 O D. V2- V2 2 42. Use the half-angle formulas to find the exact values. tan 67 30' =