Trigonometric Functions and Reference Angles in All Four Quadrants

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Mathematics
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1st - 6th Grade
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of using reference angles in trigonometry?
To simplify calculations by using a calculator
To evaluate trigonometric functions of angles in all quadrants
To limit angles to between 0 and 90 degrees
To avoid using the unit circle
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which trigonometric functions are positive where x is positive?
Tangent and cotangent
Cosine and secant
Sine and tangent
Sine and cosecant
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the reference angle determined in the second quadrant?
Subtract the angle from 360 degrees
Subtract the angle from 180 degrees
Add the angle to 180 degrees
Add the angle to 360 degrees
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the reference angle for an angle of 460 degrees?
80 degrees
40 degrees
60 degrees
100 degrees
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you determine if the trig ratio of a reference angle should be positive or negative?
By checking the unit circle
By using a calculator
By using a simple trig chart
By drawing a reference triangle
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the sine of 120 degrees?
Negative radical 3 over 2
Positive radical 3 over 2
Negative 1 over 2
Positive 1 over 2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to draw the reference angle to the x-axis?
To ensure the reference angle is in standard position
To make use of the unit circle
To avoid incorrect reference angles and trig ratios
To simplify the calculation process
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