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OpenStudy (lukecrayonz):
v=-2i+5j, whats the magnitude and direction angle?
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OpenStudy (anonymous):
okay so -2 is your x component. 5 is your y component. Tan(theta)=y/x. So since you have y and x just use ArcTan[y/x] = theta
OpenStudy (anonymous):
Magnitude is the just the distance formula from sqrt(x^2+y^2)
OpenStudy (anonymous):
this is because magnitude is the length of the vector. |dw:1328936157382:dw|
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