%3Cdiv%20class%3D%22text%20edible%20c31%22%20id%3D%22yui_3_11_0_24_1394947609563
ID: 3896760 • Letter: #
Question
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/ Answer
A.B = (4*-6) + (-4*7) = -24-28 = - 52
cos(theta) = A.B / |A||B| = -52 / (4*sqrt(2)*sqrt(49+36))
theta = 175.6 deg
A.B = 24-24 = 0
cos(theta) = 0
theta = 90 deg
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