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Cos theta=10/26, theta lies in quadrant IV
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Cos theta=10/26, theta lies in quadrant IV

User Adi Levin
by
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1 Answer

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cos(theta)=10/26=5/13
acos(5/13)=1.176 radians = 67.4 degrees
Since it is in the fourth quadrant, the angle is -67.4 degrees
User Meisam Sabaghi
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8.8k points
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