The answer to “Proving Identities Verify the identity. 1 sin x1 sin x1 sin x1 sin x 4 tan x sec x” is broken down into a number of easy to follow steps, and 19 words. This full solution covers the following key subjects: . This expansive textbook survival guide covers 13 chapters, and 1300 solutions. The full step-by-step solution to problem: 73 from chapter: 7 was answered by , our top Calculus solution expert on 01/24/18, 03:20PM. Precalculus: Mathematics for Calculus (Standalone Book) was written by and is associated to the ISBN: 9781305071759. This textbook survival guide was created for the textbook: Precalculus: Mathematics for Calculus (Standalone Book), edition: 7. Since the solution to 73 from 7 chapter was answered, more than 213 students have viewed the full step-by-step answer.