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The Hypotenuse and angle given, to find the leg conterminate with the given angle.
In the right angled Spherical Tri∣angle, ABC.
The leg BC one of the extreames adjacent is inquired.
The given Hypot. comp. AC the other extr. conj. Angle comp. C. the middle part.
Analogie, cotang. AC. Rad ∷ cos. C. tang. BC.
This also is the inverse of the 3 Probleme, and therefore needs no further demonstration.