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OpenStudy (anonymous):
Can you teach me how to solve this please? Look at pic below
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OpenStudy (anonymous):
hero (hero):
I know what a reference angle is. Define principal angle
OpenStudy (anonymous):
Principal angle is the angle between 0 and 360
OpenStudy (anonymous):
so the principal angle of -90 is 270
OpenStudy (anonymous):
I would venture out and say that it is 120 degree
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OpenStudy (anonymous):
Can you show me how you go that answer?
OpenStudy (anonymous):
id like to learn it so that I can do it myself next time. Thank you btw:)
OpenStudy (anonymous):
|dw:1333936145141:dw|
OpenStudy (anonymous):
|dw:1333936196963:dw|
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