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Find the projection ofv=<2,−2>alongw=<−3,1>(in other words find projwv). Show your work (no credit with answers without supporting work).?
please help me before yahoo shuts down :(
1 Answer
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- ?Lv 52 weeks ago
YOUR WISH IS GRANTED
cos = (2,-2).(-3,1)/|(2,-2)||-3,1| = (-6-2)/sqrt(8*10) = -8/sqrt(80) = -4/sqrt(20)
-2/s(5) *s(8)/s(10)
projection on (-3,1) = cos* |2,-2|/|-3,1| *|-3,1|
= (-4/sqrt(20))*sqrt(8)/sqrt(10)*(-3,1) =
-sqrt(128)/sqrt(200) *(-3,1) = sqrt(32)/sqrt(50) * (-3,1) = sqrt(16/25)*(-3,1)
= .8*(-3,1) = (-2.4,.8)
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