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Mathematics 7 Online
OpenStudy (anonymous):

Find the exact real value of arccos -squareroot2/2. pi/4 3pi/4 7pi/4 -pi/4 Okay so I found the degrees version of it which is 38.74 and I looked at my unit circle but I'm not sure how to get one of the choices from above. Thanks!

OpenStudy (mertsj):

|dw:1373160986635:dw|

OpenStudy (anonymous):

Okay...Not sure what to do with this picture.

OpenStudy (mertsj):

Use the Pythagorean Theorem and find x

OpenStudy (anonymous):

10?

OpenStudy (mertsj):

|dw:1373161281680:dw|

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