Use words to describe the formula given below: cos a + cos ß = 2 cos a+B 2 COS α-0 2
Use words to describe the formula given below: cos a + cos ß = 2 cos a+B 2 COS α-0 2
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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![The text on the image reads:
"Use words to describe the formula given below:
\[ \cos \alpha + \cos \beta = 2 \cos \left( \frac{\alpha + \beta}{2} \right) \cos \left( \frac{\alpha - \beta}{2} \right) \]"
This formula is an identity used in trigonometry that expresses the sum of two cosine functions in terms of the product of two cosine functions with half-angle arguments. It is useful in various mathematical and physics applications where simplifying sums of trigonometric functions is needed.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3a7b9f2b-2d52-42ce-b5e9-cacffdc0af5d%2F001f405b-f566-4f12-8047-220941b3b5d9%2Fsb2ur3a_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The text on the image reads:
"Use words to describe the formula given below:
\[ \cos \alpha + \cos \beta = 2 \cos \left( \frac{\alpha + \beta}{2} \right) \cos \left( \frac{\alpha - \beta}{2} \right) \]"
This formula is an identity used in trigonometry that expresses the sum of two cosine functions in terms of the product of two cosine functions with half-angle arguments. It is useful in various mathematical and physics applications where simplifying sums of trigonometric functions is needed.
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