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OpenStudy (anonymous):
If cos(theta)=4/7, define the angle (theta) in terms of inverse cosine function.
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OpenStudy (lucaz):
if you take the arc sine of 4/7 you find the value of theta
OpenStudy (lucaz):
sorry, arc cos
OpenStudy (mathmale):
This problem requires no work other than to utilize the definition of the arccos function. If cos theta = (4/7), then theta is simply arccos (4/7).
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