Trig 5.1

Question 1

degrees > radians

Answer 1

R = D x (∏/180°)

Question 2

radians > degress

Answer 2

D = R x (180°/∏)

Question 3

arc length formula

Answer 3

s=rθ

Question 4

find coterminal of θ = 960°

Answer 4

960° - 360°(2) = 960° - 720° = 240°

Question 5

find coterminal of θ = −225°

Answer 5

-225° + 360° = 135°

Question 6

find coterminal of θ = −5∏/6

Answer 6

−5∏/6 + 12∏/6 = 7∏/6

Question 7

find coterminal of θ = 13∏/2

Answer 7

13∏/2 - 3(4∏/2) = ∏/2 *see figure 5-10