Reference Angles
Flashcard
•
Mathematics
•
11th - 12th Grade
•
Practice Problem
•
Hard
Standards-aligned
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a reference angle?
Back
A reference angle is the acute angle formed by the terminal side of an angle in standard position and the x-axis.
2.
FLASHCARD QUESTION
Front
How do you find the reference angle for a negative angle?
Back
To find the reference angle for a negative angle, add 360° to the angle until it is positive, then find the reference angle as you would for a positive angle.
3.
FLASHCARD QUESTION
Front
What is the reference angle for -30°?
Back
30°
4.
FLASHCARD QUESTION
Front
In which quadrants are sine, cosine, and tangent positive?
Back
In Quadrant I, all trigonometric ratios (sin, cos, tan) are positive.
Tags
CCSS.HSF.TF.A.2
5.
FLASHCARD QUESTION
Front
What is the reference angle for 120°?
Back
The reference angle for 120° is 180° - 120° = 60°.
6.
FLASHCARD QUESTION
Front
How do you find the cotangent of an angle using its reference angle?
Back
To find the cotangent of an angle, use the cotangent of its reference angle and consider the sign based on the quadrant.
Tags
CCSS.HSF.TF.A.2
7.
FLASHCARD QUESTION
Front
What is the cotangent of 120°?
Back
The cotangent of 120° is -√3/3.
Tags
CCSS.HSF.TF.A.2
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