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Prove the following by vector method. In...

Prove the following by vector method. In a triangle AOB, `mangleAOB` = `90^@`. If P and Q are the points of trisection of AB, prove that
`OP^2+OQ^2` = `5/9 AB^2`

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USHA PUBLICATION-VECTORS THREE DIMENSIONAL GEOMETRY -EXERCISE
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  2. Prove the following by vector method. Median to the base of an isoscel...

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  18. Find the equation of the plane containing the line frac[x+3][3]=frac[y...

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