Question

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°

Answer 1

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°