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OpenStudy (anonymous):
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OpenStudy (btaylor):
make a right triangle to label sides: |dw:1339436492658:dw| which trig function of theta uses the two known sides?
OpenStudy (btaylor):
you use cosine. cos(theta)=9.9/14, so take arccos both sides, to get theta=arccos(9.9/14)=45 degrees.
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