If cos a + cos B= a and sina + sin B= b, then show that 2 sin 2a + sin 2B = 2ab 1 a2 + b2

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°.
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If cos a + cos B= a and sina + sin B = b, then show that
sin 2a + sin 2B = 2ab( 1
.
a² +b
Transcribed Image Text:If cos a + cos B= a and sina + sin B = b, then show that sin 2a + sin 2B = 2ab( 1 . a² +b
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