Mathematics, 23.02.2021 14:00 syed13

Through the height of an equilateral tetrahedron a, we construct a plane that intersects the lateral faces along three lines creating with the base plane of the tetrahedron with angles x, y, z. Prove: tan²x + tan²y + tan²z = 12

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Through the height of an equilateral tetrahedron a, we construct a plane that intersects the lateral...

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