Amazing Trigonometry_2

Geometry Level 3

If \(A+B+C=\pi \) and \(\cos { A } =\cos { \theta } \sin { \phi } \), \(\cos { B } =\cos { \phi } \sin { \Psi }\), \(\cos { C } =\cos { \Psi } \sin { \theta }\), then find the value of \(\tan { \theta } \tan { \phi } \tan { \Psi } \).


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