Difference between revisions of "2022 AMC 12A Problems/Problem 12"
Oxymoronic15 (talk | contribs) (Created page with "==Problem== Let <math>M</math> be the midpoint of <math>AB</math> in regular tetrahedron <math>ABCD</math>. What is <math>\cos(\angle CMD)</math>? <math>\textbf{(A) } \frac1...") |
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Revision as of 10:20, 12 November 2022
Problem
Let be the midpoint of
in regular tetrahedron
. What is
?