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Mathematics 15 Online
OpenStudy (anonymous):

HELPPP What is the angle between v= (-7,8) and w =(5,3) Use the cosine of the angle to find the actual angle between the two vectors.

OpenStudy (saifoo.khan):

There;s another way to find it too!

OpenStudy (saifoo.khan):

But that's not cosine thing.

OpenStudy (nottim):

Cos Law maybe?

OpenStudy (saifoo.khan):

Hey, i just met you And this is the problem I dont know cos rule, so tan rule maybe! :D

OpenStudy (nottim):

that'll work. cos law wouldn't work without that thrid say anyways (you can find it, but it takes a bit more time to do Cos Law)

OpenStudy (saifoo.khan):

We can use the distance for that side.

OpenStudy (nottim):

o, graphin it out would help too

OpenStudy (anonymous):

99.93?

OpenStudy (nottim):

havent doen the math myself. if others would like, maybe show yur work

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