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OpenStudy (anonymous):
what is the x and y points for -4pi/5
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myininaya (myininaya):
I assume you mean what is rcos(theta) and rsin(theta) where x=rcos(theta) and y=rsin(theta) ?
OpenStudy (anonymous):
YES
myininaya (myininaya):
Plug in theta=-4pi/5 and evaluate based on the unit circle You might wwant to do -4pi/5+2pi if you prefer to look at positives
myininaya (myininaya):
You may have use identities before using that chart unless you are able to approximate x and y .
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