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OpenStudy (artemisxrpg):
Find a so that the verctors v = i -aj and w = 2i+3j are orthgonal.
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OpenStudy (anonymous):
use dot product v.w=0 i.e 2-3a=0 or a=2/3
OpenStudy (artemisxrpg):
Oh, I thought it was a bit more complicated than that.
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