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A tetrahedron has vertices {O}{({0},{0},{0})},{A}{({1},{2},{1}

Question

A tetrahedron has vertices $O (0, 0, 0), A (1, 2, 1), B (2, 1, 3), a n d C (- 1, 1, 2),$ then angle between face $O A B a n d A B C$ will bea. $cos^{- 1} (\frac{17}{31})$ b. $30^{0}$ c. $90^{0}$ d. $cos^{- 1} (\frac{19}{35})$

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Luna Discussed

A tetrahedron has vertices

O (0, 0, 0), A (1, 2, 1), B (2, 1, 3), a n d C (- 1, 1, 2),

then angle between face

O A B a n d A B C

will bea.

cos^{- 1} (\frac{17}{31})

30^{0}

90^{0}

cos^{- 1} (\frac{19}{35})

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Question Text	A tetrahedron has vertices $O (0, 0, 0), A (1, 2, 1), B (2, 1, 3), a n d C (- 1, 1, 2),$ then angle between face $O A B a n d A B C$ will bea. $cos^{- 1} (\frac{17}{31})$ b. $30^{0}$ c. $90^{0}$ d. $cos^{- 1} (\frac{19}{35})$
Answer Type	Video solution: 1
Upvotes	150