If alpha,beta, gamma are the direction a...

If `alpha,beta, gamma` are the direction angles of a vector and `cos alpha=(14)/(15), cos beta=(1)/(3)`, then `cos gamma=`

A

(a) `pm(2)/(15)`

B

(b) `(1)/(5)`

C

(c) `pm(1)/(15)`

D

(d) `(2)/(5)`

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The correct Answer is:

A

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