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in Mathematics by (73.1k points)

What is the angle subtended by an edge of a regular tetrahedron at its center?

(A)  cos-1 (-1/2)

(B)  cos-1 (-1/2)

(C)  cos-1 (-1/3)

(D)  cos-1 (-1/√3)

1 Answer

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Best answer

Correct option  (C) cos-1(-1/3)

Explanation:

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