The answer to “Horizontal and vertical tangents Find the points at which the following polar curves have a horizontal or a vertical tangent line.r = 4 cos ?” is broken down into a number of easy to follow steps, and 25 words. Since the solution to 15E from 10.3 chapter was answered, more than 245 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 15E from chapter: 10.3 was answered by , our top Calculus solution expert on 03/03/17, 03:45PM. This textbook survival guide was created for the textbook: Calculus: Early Transcendentals, edition: 1. This full solution covers the following key subjects: vertical, horizontal, points, curves, line. This expansive textbook survival guide covers 85 chapters, and 5218 solutions. Calculus: Early Transcendentals was written by and is associated to the ISBN: 9780321570567.