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OpenStudy (anonymous):
Find the dot product, a • b. a = 6i + 5j, b = -5i + 4j
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OpenStudy (anonymous):
multiple the i with the i and the j with the j since i . i =1 n j . j =1 you will get the answer in magnitude form...
OpenStudy (anonymous):
-30,20 ?
OpenStudy (anonymous):
\[a \cdot~b=(6i+5j)~\cdot~(-5i+4j)\]
OpenStudy (anonymous):
correct so u have \(a \cdot~b=-30+20=?\)
OpenStudy (anonymous):
-10!
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OpenStudy (anonymous):
Perfect :) All THe best :)
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