The angle between the vectors a + b & a - b , given | a |=2,| ~b |=1 and angle between a…

Mathematics · JEE Main · NTA Exams — Three Dimensional Geometry

1. \(\tan ^{-1} \frac{2}{\sqrt{3}}\)
2. \(\tan ^{-1} \sqrt{\frac{2}{3}}\)
3. \(\tan ^{-1} \sqrt{\frac{3}{7}}\)
4. none

Answer

(A) ^ -1 2 3

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