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OpenStudy (anonymous):
Find the exact real value of arccos (- √2/2)
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OpenStudy (eyust707):
What angle would you plug into cos to make it equal -rt2/2
OpenStudy (australopithecus):
OpenStudy (australopithecus):
remember cos = x sin = y
OpenStudy (anonymous):
3pi/4
OpenStudy (australopithecus):
you put an angle into cos or sin you get a coordinate you put a coordinate in arcos, arcsin and you get an angle
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OpenStudy (eyust707):
Correct
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