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Skotster
Sep4-04, 10:30 AM
Am I interpreting this question correctly?

Vector A has a magnitude of 8 units and makes an angle of 45 degrees with the positive x axis. Vector B also has a magnitude of 8 units but points in the -x direction. ...

So, does that mean:

Vector A=8 at 45 degrees
Vector B=8 at 180 degrees

or

Vector A=8 at 45 degrees
Vector B=8 at 225 degrees

I know how to do the problem, it's just interpreting the book's wording on angles.

Thanks

Nylex
Sep4-04, 10:41 AM
A at 45 degrees and B at 180 degrees. Saying vector B points in the -x direction is the same as saying vector B makes an angle of 180 degrees with the +ve x axis.

Skotster
Sep4-04, 10:45 AM
Thanks much

HallsofIvy
Sep4-04, 01:45 PM
225 degrees would be opposite to A's direction not in "the -x direction. ... "