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Let A(3,0,-1) ,B(2,10,6) and C(1,2,1) be...

Let A(3,0,-1) ,B(2,10,6) and C(1,2,1) be the vertices of a triangle and M be the mid- point of AC.
If G divides BM in the ratio `2:1` then cos `( angle GOA)` (O being the origin) is equal to

A

`(1)/(2sqrt(15))`

B

`(1)/(sqrt(15))`

C

`(1)/(6sqrt(10))`

D

`(1)/(sqrt(30))`

Text Solution

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The correct Answer is:
B
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