SAT Math Practice Question #21987 - SATify | SATify

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SAT Math Practice Question #21987 - SATify | SATify

#21987

geometry

3d geometry

trigonometry

hard

180 sec

Let $A BC D$ be a regular tetrahedron. What is the cosine of the angle between an edge and a face not containing that edge?

A.

$\frac{1}{4}$

B.

$\frac{1}{3}$

C.

$\frac{3}{3}$

D.

$\frac{1}{2}$

E.

$\frac{6}{3}$