These are 12 digital task cards with multiple-choice questions. Each card contains one question. The problems are mainly of three types: 1) finding the slope of a tangent line to a given function/curve at a given point 2) finding the measure of the angle between the tangent line to a given curve at a given point and the positive direction of x-axis 3) finding the point on the graph of a given function at which the tangent line makes an angle with given measure with the positive direction of x