Trigonometric and Polar Functions
Which term describes how many cycles a sinusoidal function completes in 2π units?
Amplitude
Phase Shift
Frequency
Vertical Shift
Which value determines the period of a cosine function in y = cos(bx)?
y
x
cos
b
If the volume of tank oscillates between 2000 gallons at its lowest and 5000 gallons at its highest due to a pumping system that operates on a sinusoidal schedule every 8 hours what is the approximate volume rate of change per hour when it is filling the most quickly?
250 gallons per hour
500 gallons per hour
375 gallons per hour
750 gallons per hour
What is the amplitude of the function ?
-5
5
If the function has a removable discontinuity, what is the value of after the discontinuity has been removed?
Undefined
4
-4
0
What does "sin" represent in the equation ?
A constant that equals approximately 0.8414709848...
The slope of a line on a graph.
A trigonometric function that gives you a ratio related to a right triangle.
A variable representing an unknown value.
What type of transformation occurs if we change to ?
Vertical stretch by a factor of -1.
Reflection over the x-axis.
Vertical shrink by a factor of 10 for shifting upward by one unit.

How are we doing?
Give us your feedback and let us know how we can improve
What effect does adding to every input value (in radians) have on the graph of ?
It reflects the graph about line without any shift or stretch.
It shifts the graph down by units on -axis (a vertical shift).
It stretches the graph vertically by a multiple of units.
It shifts the graph left by units along -axis (a phase shift).
What is the effect of the phase shift constant "c" in the model form when measuring horizontal shift on the graph?
It controls vertical stretch or compression of the wave.
It modifies where peak and trough occur along the horizontal axis of the graph.
It determines periodic cycle of the graph.
It adjusts maximum and minimum values in sinusoidal functions.
If y = sin(x) has a period of , what is an equivalent expression for a sinusoid with double that period?
y = sin(\pi x)
y = sin(x + \pi)
y = sin(2x)
y = sin(0.5x)