Which of the following cosine functions has a period of 3 π ?
a. y = 3cosx
b. y = cos3x
c. y = cos2/3x
d. y = 1/3cosx

What is the measure of ac? 5 units 13 units 26 units 39 units

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Does the point (1, sqrt 7) lie on circle shown.