Teaching MPPSC Assistant Professor Mock Test Series 2025 Physical Sciences Mathematical Methods of Physics
माना \( \vec{a} = 2\hat{i} + 3\hat{j} + \hat{k} \ \ \text{और} \ \ \vec{b} = \hat{i} - \hat{j} + 2\hat{k}\) है, सदिश \(\vec{a} \ \) और सदिश \(\vec{b} \ \) के बीच का कोण θ ज्ञात कीजिए।
1
\(\theta = 45^\circ \ \)
2
\(\theta = 60^\circ \ \)
3
\(\theta = \cos^{-1}\left(\frac{5}{6}\right) \ \)
4
\(\theta = \cos^{-1} \left( \frac{1}{2 \sqrt{21}}\right) \)