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Asked by Dan

angle x lies in quadrant 3 and cos(x)=-.6. Find cos(3pi/2-x)
14 years ago

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Answered by Henry
cos(x) = -0.6.
X = 126.87 deg.

cos(3pi/2-X) = cos(270-126.87) = -0.8
14 years ago
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angle x lies in quadrant 3 and cos(x)=-.6. Find cos(3pi/2-x)

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