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OpenStudy (anonymous):
HELP! find the exact value of the real number y in the equation Y=cos-1(√2/2)
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OpenStudy (anonymous):
Y = 45(degrees)...you are finding the cos-1(√2/2) Which is in the first quadrant.
OpenStudy (dumbcow):
yep, 45 degrees or pi/4 in radians Use unit circle and find sqrt2/2
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