What is the reference angle for -30°?
The Unit Circle
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Mathematics
•
11th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
30°
2.
FLASHCARD QUESTION
Front
Find a coterminal angle to 45°.
Back
405°
3.
FLASHCARD QUESTION
Front
What is sin(π/4)?
Back
√2∕2
4.
FLASHCARD QUESTION
Front
What is cos(π/4)?
Back
√2∕2
5.
FLASHCARD QUESTION
Front
In which quadrants is cosθ positive?
Back
the 1st and 4th quadrants
6.
FLASHCARD QUESTION
Front
What is the definition of a coterminal angle?
Back
Angles that differ by a multiple of 360°.
7.
FLASHCARD QUESTION
Front
What is the reference angle for 150°?
Back
30°
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