Wednesday
July 23, 2014

Homework Help: math

Posted by yuni on Saturday, December 24, 2011 at 9:51pm.

the position vectors of the point A,B & C respect to O are a=3i-2j+4k, b=i+3j-4k, c=-2i+5j-3k. Find
a)the angle between a+b and a-b
b)lamdar if vector a is perpendicular to b+lamdar k.

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