Derivative/differentiation problems. Please show explanation/calculations

11 - Find equation of tangent line to the curve y = ( x 2_ 4 ) cot ( x ) When x = 7 A plane flying horizontally at an altitude of 2 mile, and a speed of 570 mile ( hr Passes directly overe a radio Station. Find the rate at which the distance from the Plane to the Station is increasing when it is 5 mile away from the Station