Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (25°) – sin° (25°) = cos(A°), then A = degrees. (b) If cos (4x) – sin (4x) = cos(B), then %3D

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.2: Trigonometric Functions Of Angles
Problem 40E
icon
Related questions
Question
Using a double-angle or half-angle formula to simplify the given expressions.
(a) If cos (25°) – sin (25°) = cos(A°), then
A
degrees.
(b) If cos (4x) – sin (4x) = cos(B), then
B =
Question Help: Worked Example 1 Message instructor
Submit Question
Transcribed Image Text:Using a double-angle or half-angle formula to simplify the given expressions. (a) If cos (25°) – sin (25°) = cos(A°), then A degrees. (b) If cos (4x) – sin (4x) = cos(B), then B = Question Help: Worked Example 1 Message instructor Submit Question
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Recommended textbooks for you
Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
Algebra and Trigonometry (MindTap Course List)
Algebra and Trigonometry (MindTap Course List)
Algebra
ISBN:
9781305071742
Author:
James Stewart, Lothar Redlin, Saleem Watson
Publisher:
Cengage Learning
Trigonometry (MindTap Course List)
Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781337278461
Author:
Ron Larson
Publisher:
Cengage Learning