Rewrite 240 degree in radian measure as a multiple of pi A p

Rewrite 240 degree in radian measure as a multiple of pi. (A) pi/6; (B) - pi/6; (C) 5 pi/6; (D) 7 pi/6; (E) pi/4; (G) 3 pi/4; (H) 5 pi/4; (I) 7 pi/4; (J) 4 pi/3 Given cos(t) = -5/12 find sec(-t). (A) 5/12; (B) 12/5; (C) -5/12; (D) -12/5; (E) -5/13; (F) -13/5; (G) 5/13; (H) 13/5; (I) 13/12; (J) -13/12 Use a calculator to find cos(44 degree). Round to three decimal places. Answer: Find cot(theta) if cos(theta) = 5/6 and sin(theta)

Solution

8. pi = 180 deg. Hence 240 deg = 180 + 60 = pi + pi/3 = 4pi/3

9. cost = -5/12

sec(-t) = sect = 1/cost = -12/5

10. cos 44 = 0.719