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Precalculus 18 Online
OpenStudy (anonymous):

Determine the sign of cos pi/7 without using a calculator.

OpenStudy (rsadhvika):

|dw:1373282000604:dw|

OpenStudy (anonymous):

Is the function sec t positive or negative in Quadrant II?

OpenStudy (anonymous):

i put positive

OpenStudy (rsadhvika):

|dw:1373282113813:dw|

OpenStudy (rsadhvika):

|dw:1373282172374:dw|

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