The direction angles of the line x=4z+3,...

The direction angles of the line `x=4z+3,y=2-3z" are "alpha,betaandgamma`,
then `cosalpha+cosbeta+cosgamma`=_____.

A

(a) `(2)/(sqrt(26))`

B

(b) `(8)/(sqrt(26))`

C

(c) `1`

D

(d) `2`

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The correct Answer is:

A

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