Advertisements
Advertisements
Question
Express the following as a sum or difference of two trigonometric function:
2 cos 4θ cos 2θ
Sum
Advertisements
Solution
2 cos 4θ cos 2θ
= cos (4θ + 2θ) + cos (4θ – 2θ)
= cos 6θ + cos 2θ
shaalaa.com
Is there an error in this question or solution?
Chapter 3: Trigonometry - 2 - Exercise 3.4 [Page 51]
