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Mathematics 16 Online
OpenStudy (anonymous):

cos(7pi/6) Without a calculator!

OpenStudy (moongazer):

do you know the unit circle?

OpenStudy (anonymous):

use wolfram.

OpenStudy (anonymous):

|dw:1344327199896:dw| first of all

OpenStudy (anonymous):

yes i know the unit circle..

OpenStudy (moongazer):

What are the coordinates of 7pi/6 or 210degrees?

OpenStudy (anonymous):

Draw and find out between which quadrant it lies on first.

OpenStudy (anonymous):

third quad.

OpenStudy (anonymous):

|dw:1344327329200:dw|

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