Homework SourseExpress the product as a sum containing only sines or cosine
Express the product as a sum containing only sines or cosines. 1/2 [cos(5 theta) cos theta] cos^2 (6 theta^2) 1/2 [cos theta + cos (5 theta)] 1/2 [cos(5 theta) - sin theta]![Express the product as a sum containing only sines or cosines. 1/2 [cos(5 theta) cos theta] cos^2 (6 theta^2) 1/2 [cos theta + cos (5 theta)] 1/2 [cos(5 theta)](/WebImages/4/express-the-product-as-a-sum-containing-only-sines-or-cosine-979447-1761502674-0.webp "Express the product as a sum containing only sines or cosines. 1/2 [cos(5 theta) cos theta] cos^2 (6 theta^2) 1/2 [cos theta + cos (5 theta)] 1/2 [cos(5 theta)")
Solution
Option C) is correct.
As we know Cos(A+B)+Cos(A-B) = 2CosACosB
cos3*cos2 = 0.5[cos(3 + 2) + cos(3 - 2)] = 0.5*[cos(5) + cos()]
