

MCQOPTIONS
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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. \[\frac{1}{5}\] | |