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OpenStudy (anonymous):
If 0 lies in the quadrant IV. What can be the value of cos 0 ?
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OpenStudy (january123):
What do you think?
OpenStudy (anonymous):
The value of all cos values is positive in the fourth quadrant right?
OpenStudy (solomonzelman):
cos(0)=cos(45-45)=sin(45)cos(45)+sin(45)cos(45)|dw:1424792588493:dw|
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