1.

If a,b,g  be the direction angles of a vector and \[\cos \alpha =\frac{14}{15}\], \[\cos \beta =\frac{1}{3}\] then \[\cos \gamma \]=

A. \[\pm \frac{2}{15}\]
B. \[\frac{1}{5}\]
C. \[\pm \frac{1}{15}\]
D. None of these
Answer» B. \[\frac{1}{5}\]


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