1.

The points A, B and C with position vectors veca, vecb and vec c respectively lie on a circle centered at origin O. Let G and E be the centroid of DeltaABC and DeltaACD respectively where D is mid point of AB. Q.If OE and CD are mutually perpendicular, then which of the following will be necessarily true ?

Answer»

`|vecb-veca|=|VEC C-veca|`
`|vecb-veca|=|vecb-vec c|`
`|vec c-veca|=|vec c-vecb|`
`|vecb-veca|=|vec c-veca|=|vecb-vec c|`

ANSWER :A


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