Verify the identity.cos 3x = cos3 x - 3 sin2 x cos x
What will be an ideal response?
cos 3x = cos (2x + x) = cos 2x cos x - sin 2x sin x = 
= 
= cos3 x - 3 sin2 x cos x.
You might also like to view...
Determine if the series converges or diverges; if the series converges, find its sum.
A. Converges; 
B. Converges; 
C. Converges; 
D. Diverges
Use a graphing utility to find the equation of the line of best fit. Round to two decimal places, if necessary.Managers rate employees according to job performance and attitude. The results for several randomly selected employees are given below.
A. y = 2.81 + 1.35x B. y = 92.3 - 0.669x C. y = -47.3 + 2.02x D. y = 11.7 + 1.02x
Prove the identity.sin 6x = 2 sin x cos x (3 - 4 sin2 x)(1 - 4 sin2 x).
What will be an ideal response?
Graph the linear equation using intercepts.x - 2y = 8
A. 
B. 
C. 
D. 