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Questions on trigonometric and hyperbolic functions, as well as their inverses, in Mathematica.

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How to solve this trigonometric equation?

I am a new user of Mathematica. I want to solve the following equation a*Tan[a] = Sqrt[(52.7531 - a^2)] for a, where a is a real value. I used the Solve function, but I am not getting the right an …
Aashiek Hariharan's user avatar