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OpenStudy (anonymous):
Solve the problem: Find a so that the vectors v= i + aj and w = -4i - 2j are orthogonal
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OpenStudy (anonymous):
Set the dot product to zero and solve for a
OpenStudy (anonymous):
\[\vec{a}\cdot\vec{b} = a_xb_x + a_yb_y + a_zb_z\](In three dimensions)
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