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Geometry 7 Online
OpenStudy (anonymous):

True or False The y-value for y = cos(x) when x = -90° is 0.

OpenStudy (raffle_snaffle):

well look at the unit circle...

OpenStudy (raffle_snaffle):

where is cos(x)=0?

OpenStudy (raffle_snaffle):

|dw:1396135092184:dw|

OpenStudy (raffle_snaffle):

|dw:1396135156241:dw|

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