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In isosceles triangles A B C ,| vec A B|...

In isosceles triangles `A B C ,| vec A B|=| vec B C|=8,` a point `E` divides `A B` internally in the ratio 1:3, then find the angle between ` vec C Ea n d vec C A(w h e r e| vec C A|=12)dot`

A

`(-3sqrt(7))/(8)`

B

`(3sqrt(8))/(17)`

C

`(3sqrt(7))/(8)`

D

`(-3sqrt(8))/(17)`

Text Solution

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The correct Answer is:
C
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