Prove the identity. 2 sin 20 cos 20+ cos 40=1-sin 40 To verify the identity, work each side separately until you obtain the same expression. Start with the left side. Choose the correct step and transform the expression according to the step chosen. 2 sin ²0 cos ²0 + cos 40 = Now apply an identity to just the expression in the parentheses The part of the expression in parentheses simplifies to Continue the proof. 2 sin 20 cos 20+ cos 40 = a way that will further the proof of the identity. Apply a 1-sin ¹0 identity.
Prove the identity. 2 sin 20 cos 20+ cos 40=1-sin 40 To verify the identity, work each side separately until you obtain the same expression. Start with the left side. Choose the correct step and transform the expression according to the step chosen. 2 sin ²0 cos ²0 + cos 40 = Now apply an identity to just the expression in the parentheses The part of the expression in parentheses simplifies to Continue the proof. 2 sin 20 cos 20+ cos 40 = a way that will further the proof of the identity. Apply a 1-sin ¹0 identity.
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.2: Trigonometric Functions Of Angles
Problem 68E
Related questions
Question
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
Recommended textbooks for you
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage