u * v / |u| |v| = cos theta how is -14/39 = cos theta = 1.94? if -14/(13 * 3) = cos theta please help if this makes any sense. find the angle between u and v give your answer to the nearest .01 radians.
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Originally Posted by rcmango ... if -14/(13 * 3) = cos theta ... Hello, you have: cos(θ) = -14/39. Now use the arccos-function: arccos(-14/39) = 1.9379651... EB
Originally Posted by rcmango -14/39 = cos theta = 1.94 Pet Peeve alert! Are you seriously suggesting that -14/39 = 1.94 ?? Be careful of what you write. Students have lost points on tests for less! -Dan
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