Angles
Angle in degrees equaling one revolution of the unit circle.
What is 360?
Quadrant(s) where sin and cos are both negative.
What is QIII?
Value in the equation causing a vertical stretch.
y = 3 cos 2(x - Pi) - 4
Give the variable and number.
What is a = 3?
Formula used to find degree angles in QII.
What is 180 - RA?
Method used to solve a triangle with no corresponding pair.
What is Law of Cosines?
Angle in radians equaling one revolution of the unit circle.
What is 2Pi?
Quadrant(s) where tan is negative.
What are QII and QIV?
Value in the equation causing a vertical shift up.
y = 2 cos 4(x + Pi) + 1
Give the variable and number.
What is k = 1?
Formula used to find radian angles in QIII.
Pair of unit circle angles whose sum is 75 degrees.
What are 30 degrees and 45 degrees?
These QI angles help to find angles in other quadrants.
What are reference angles?
QII angle in radians with a cos value of -1/2.
What is 2Pi/3?
Change caused by the b-value.
y = 4 cos 3(x + Pi/2) - 3
What is horizontal compression by 3?
Formula used to find radian angles in QIV.
What is 2Pi - RA?
The amplitude of a graph is half of this.
What is height?
An angle in standard position whose terminal ray falls on the x or y-axis.
What are quadrantal angles?
Quadrant IV angle in radians with a cos value of sqrt(3)/2.
What is 11Pi/6?
Change caused by the h-value.
y = 1/2 cos 2(x - Pi/2) + 2
What is right Pi/2?
Method to address the two types of trig functions in the given equation.
sin x cos x - cos x = 0
What is divide out the GCF?
Values that make up the range of both sin and cos.
What are [-1, 1]?
Angles in standard position that also share a terminal ray. (Hint: They get there a different way.)
What are coterminal angles?
Quadrant III angle in radians with a tan value of sqrt(3).
What is 4Pi/3?
The period of the graph
y = 2 cos 3(x - Pi) + 3
What is 2Pi/3?
Method to address the two types of trig functions in the given equation.
sin2x - cos x = 0
What is substitute with a Pythagorean Identity?
Method used to verify a trig identity where the problem is rewritten in terms of only sin and cos.
What is "Make them speak the same language"?