Write the sum as a product: sin(20.2b)−sin(6.4b)=

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
Question

Write the sum as a product:
sin(20.2b)−sin(6.4b)=

Expert Solution
Step 1

Recall:

  • sin(C)-sin(D)=2 cosC+D2 sinC-D2
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