Phase shift equations on sine and cosine

Find the period of y=2sin[1/4x-π/2]

• π/2

• 8π

• 4π

• π

What is the amplitude of this function?

• 2
• 2π
• -2
• 1

Which is an equation of the cosine function with an amplitude of 2, period of Π, phase shift of Π/2?

• y= -2cos(x/2 - ∏/4)
• y= 2cos (x/2 + ∏)
• y= 2cos (2x-∏)
• y= -2cos(2x-∏/2)

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

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

Phase shift means ...

• An up or down movement
• A left or right movement
• Height of graph
• ...set Phasers to stun

What is the maximum value of the wave y = 10sin(2x - 20) + 25?

• 10
• 20
• 35
• 30

What is the phase shift for the function
f(x) = -2sin(4x + π) - 1

• π
• 4π
• 2π
• π⁄4