N N IN (a) Find the unit vectors that are parallel to the tangent line to the curve y = 2 sin x at the point (7/6, 1). (Enter your answer as a comma-separated list of N (c) Sketch the curve y = 2 sin x and the vectors in parts (a) and (b), all starting at (7/6, 1). (b) Find the unit vectors that are perpendicular to the tangent line. N N vectors.)