Sunday

April 19, 2015

April 19, 2015

Posted by **Anonymous** on Saturday, April 24, 2010 at 4:31pm.

a) Show that vector OA + vector OB + vector OC = vector 0

- calculus -
**Damon**, Saturday, April 24, 2010 at 5:27pm|OA|=|OB|=OC| symmetry

Add components in direction of OA

|OA| - |OB| sin 30 - |OC| sin 30

but sin 30=1/2

Add components perpendicular to OA

|OC|cos 30 - |OB| cos 30 = 0

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