Given sin (theta) = -1, find sec (theta)

a. - 1

b. 0

c. 1

d. undefined

Given cos (theta) = 1, find (theta)

a. 90°

b. 270°

c. 0°

d. 180°

First problem:

sec (theta) = 1/sin (theta) = 1 / (-1) = - 1

Answer: a. - 1

Second problem:

cos (theta) = 1

You need to use the inverse cosine function, cos^-1 x.

theta = cos^-1 (1) = 0°

Answer: c. 0°