Teaching EMRS PGT Mock Test 2023 Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
यदि \(\left( {\frac{1}{2},\frac{1}{3},n} \right)\)एक रेखा की दिक्-कोज्या हैं, तो n का मान है:
1
\(\frac{{\sqrt {23} }}{6}\)
2
\(\frac{{23}}{6}\)
3
\(\frac{2}{3}\)
4
\(\frac{3}{2}\)