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OpenStudy (kj4uts):
Calculate cos(theta) to two decimal places.
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OpenStudy (kj4uts):
OpenStudy (freckles):
I would think to use law of cosines \[a^2=b^2+c^2-2bc \cos( A)\] |dw:1424119438873:dw|
OpenStudy (freckles):
by the way my A is your theta
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