This is most likely coming from a triangle where angle x has an opposite side of length 9.4, and an adjacent side of length 8.2, giving rise to the equation tan(x) = 9.4/8.2 x = (tan^-1)(9.4/8.2) Simplifying gives: x = (tan^-1)(1.146) x = 48.9 degrees. This is approximately equal to 49 degrees.
