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Mathematics 9 Online
OpenStudy (babynini):

Help with vectors :)

OpenStudy (babynini):

how do i find an angle between u and v in degrees?

myininaya (myininaya):

\[\cos(\theta)=\frac{u \cdot v}{|u| \cdot |v|}\]

myininaya (myininaya):

where theta is the angle you are looking for

OpenStudy (babynini):

Thank you!

OpenStudy (babynini):

So can you check this really quick? u = <-1,-2> v=4i+3j ---- calculations ---- theta = 153.43

OpenStudy (babynini):

@myininaya :)

myininaya (myininaya):

so you did you dot product and your magnitudes?

myininaya (myininaya):

yep just did the calculations that seems to be right

OpenStudy (babynini):

Yep! fantastic. thanks :)

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