Express the given sum or difference as a product of sines and/or cosines.\\ $\cos\frac{50}{2} - \cos\frac{70}{2}$
Added by Kenneth S.
Close
Step 1
Step 1: Use the identity cos(A) - cos(B) = -2sin((A+B)/2)sin((A-B)/2) to express the given difference as a product of sines and/or cosines. Show more…
Show all steps
Your feedback will help us improve your experience
Piyush Kumar Gupta and 53 other Algebra and Trigonometry educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Express the given sum or difference as a product of sines and/or cosines. sin 5θ + sin 9θ sin 5θ + sin 9θ =
Piyush Kumar G.
Express the sum or difference as a product of sines and/or cosines. sin (4̸) - sin (2̸) A. 2 sin ̸ cos (3̸) B. sin (3̸) cos ̸ C. 2 sin (3̸) cos ̸ D. sin ̸ cos (3̸)
Kumareshwaran R.
Express each sum or difference as a product of sines and/or cosines. $$ \cos \frac{\theta}{2}-\cos \frac{3 \theta}{2} $$
Analytic Trigonometry
Product-to-Sum and Sum-to-Product Formulas
Recommended Textbooks
Introductory and Intermediate Algebra for College Students 4th
Prealgebra
Prealgebra and Introductory Algebra
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD