The full step-by-step solution to problem: 72E from chapter: 7.4 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: functions, tan, relations, Using, Trigonometric. This expansive textbook survival guide covers 112 chapters, and 5248 solutions. Calculus: Early Transcendentals was written by and is associated to the ISBN: 9780321570567. The answer to “Rational functions of trigonometric functions An integrand with trigonometric functions in the numerator and denominator can often be converted to a rational integrand using the substitution u =tan (x/2) or x = 2 tan?1 u. The following relations are used in making this change of variables.A: B: C: Verify relation A by differentiating x =2tan?1 u. Verify relations B and C using a right-triangle diagram and the double-angle formulas” is broken down into a number of easy to follow steps, and 69 words. Since the solution to 72E from 7.4 chapter was answered, more than 251 students have viewed the full step-by-step answer.