need help

**scrappy** · November 13th 2006, 12:00 AM

if the magnitude of the vector v= 1/2 and a= 113 degrees
write the vector v in terms of i and j

u= 2i -5j w= -i -6j

**topsquark** · November 13th 2006, 03:18 AM

Originally Posted by scrappy

if the magnitude of the vector v= 1/2 and a= 113 degrees
write the vector v in terms of i and j

u= 2i -5j w= -i -6j

What does this have to do with u and w?

In the usual coordinate system:
$v_x = |v|cos(113^o) \approx -0.19537$
$v_y = |v|sin(113^o) \approx 0.46025$

So v = -0.915i + 0.460j

-Dan

Thread: need help

LinkBack

Thread Tools

Display

need help