Period, Amplitude and Unit Circle

• A

• B

• C

• D

Hint 1: Graph in Calculator. (NO ZOOM TRIG)

Hint 2: Interval length of the cycle. START from 0 and END when begins to repeat.

• A

• B

• C

• D

Hint 1: Use Unit Circle to find EXACT ANSWER.

Hint 2: cos θ = x coordinate

• A

• B

• C

• D

What is the amplitude of the graph? 

• 1

• 3

• 6

• 9

What is the period?

What is the equation of the graph shown?

What is the period?

• 4π

• 2π

• π

• 8π

What is the equation of the graph?

• y = -2 cos x - 3

• y = 3 cos x - 2

• y = -7 cos x - 3

• y = -3 cos x - 4 

A trig function has an amplitude of 4 and a minimum value of 5.  What is its maximum value?

• 7

• 9

• 11

• 13