Teaching UP TGT Mock Test Series 2025 Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
यदि किसी रेखा का दिक्-अनुपात क्रमशः 5, 4, -7 है, तो दिशा कोज्या है:
1
\(\frac{7}{\sqrt{90}}, \frac{4}{\sqrt{90}}, \frac{5}{\sqrt{90}}\)
2
\(\frac{5}{\sqrt{90}}, \frac{4}{\sqrt{90}}, \frac{-7}{\sqrt{90}}\)
3
\(\frac{5}{\sqrt{70}}, \frac{4}{\sqrt{70}}, \frac{-7}{\sqrt{70}}\)
4
\(\frac{3}{\sqrt{90}}, \frac{4}{\sqrt{90}}, \frac{-5}{\sqrt{90}}\)