Sect 4.4 #46, limit as x goes to infinity, x*tan(1/x)

Sect 4.4 #46, limit as x goes to infinity, x*tan(1/x)

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Math topics:
_Elementary_special_functions_##Elementary special functions##_Exponentiation_##Exponentiation##_Square_(algebra)_##Square (algebra)##_Trigonometric_functions_##Trigonometric functions##_Analytic_geometry_##Analytic geometry##_Parabola_##Parabola##_Tangent_##Tangent##_Three-dimensional_space_(mathematics)_##Three-dimensional space (mathematics)##_Secant_line_##Secant line##_Mathematical_analysis_##Mathematical analysis##_Indeterminate_form_##Indeterminate form##_Zero_of_a_function_##Zero of a function##_Derivative_##Derivative
Other topics:
_Logic_##Logic##_Rule_of_inference_##Rule of inference##_Infinity_##Infinity##_Extended_real_number_line_##Extended real number line
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