
Reference Angles and Trigonometric Functions
Interactive Video
•
Mathematics
•
9th - 10th Grade
•
Practice Problem
•
Hard
Thomas White
FREE Resource
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14 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main goal of the video tutorial?
To understand the history of trigonometry
To evaluate trigonometric functions for 840 degrees
To learn how to draw a unit circle
To memorize the unit circle
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in evaluating trigonometric functions for 840 degrees?
Finding the reference angle
Drawing a triangle
Finding the terminal side on the unit circle
Calculating the sine value
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In which direction do we move to find the terminal side of 840 degrees?
Positive direction
Counterclockwise direction
Negative direction
Clockwise direction
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the reference angle for 840 degrees?
30 degrees
45 degrees
60 degrees
90 degrees
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why can't we use angles greater than 360 degrees when finding reference angles?
They are not co-terminal
They are not on the unit circle
They are not acute angles
They are too large to calculate
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the smallest co-terminal angle for 840 degrees?
300 degrees
240 degrees
180 degrees
120 degrees
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which formula is used to verify the reference angle in the third quadrant?
Theta Prime = Theta - 180
Theta Prime = Theta + 90
Theta Prime = Theta - 90
Theta Prime = Theta + 180
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