Use cos(u + v) = cos(u) cos(v) — sin(u) sin(v) or cos(u − v) = cos(u) cos(v)+sin(u)sin(v) to find the cos(165°).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 54E
icon
Related questions
Question

14.  to find the exact value of cos(165 )/ no calculater way please 

Use cos(u + v) = cos(u) cos(v) — sin(u) sin(v) or cos(u-v) = cos(u) cos(v) + sin(u) sin(v) to find the
= cos(165°).
Transcribed Image Text:Use cos(u + v) = cos(u) cos(v) — sin(u) sin(v) or cos(u-v) = cos(u) cos(v) + sin(u) sin(v) to find the = cos(165°).
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Recommended textbooks for you
Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
Elementary Linear Algebra (MindTap Course List)
Elementary Linear Algebra (MindTap Course List)
Algebra
ISBN:
9781305658004
Author:
Ron Larson
Publisher:
Cengage Learning