Trig Waves

What is the amplitude of y = 3 cos 2x?

• 3
• 2
• 90
  90⁰
• 350⁰

Which of these equations has an amplitude of 6?

• y=6sinx

• y= -1 + sin6x

• y=sin(x/6)

• y=6 + sinx

What is the period of y = 4Cos(2x)?

• 4π
• π
• 2π
• π/2

The amplitude of y = -8sin(3x)+5...

• 5

• 3

• -8

• 8

5.  Write an equation for the cosine function with amplitude 3, period 2pi, phase shift of pi, and vertical shift of 5.

• y = 5cos(x - pi) + 3
• y = 3cos(x - pi) + 5
• y = 3cos(2x - pi) + 5
• y = 5cos(2x - pi) + 3

6.  What is the vertical shift for y = 4cos(¹/₂x +π) - 2?

• up 2
• left 2
• right 2
• down 2

7.  What is the phase shift for y = 4cos(¹/₂x +π) - 2?

• left pi/2
• right pi/2
• right 2pi
• left 2pi

8.  What is the period for y = 4cos(¹/₂x +π) - 2?

• pi/2
• pi
• 3pi
• 4pi

15.  What is the amplitude and period of the function: y= 2/5sin9x

• Amplitude: 2/5 Period: 2π/9
• Amplitude: 2/5 Period: π/6
• Amplitude: 5/2 Period: 2π/9
• Amplitude: 5/2 Period: π/6