Rewrite with only sin x and cos x.sin 3x + cos 3x
A. sin x cos2x - sin3x + cos3x - sin2x cos x
B. 2 sin x cos2x + sin3x - cos3x - 2 sin2x cos x
C. 2 sin x cos2 x + cos x + 1 - sin2 x + cos x
D. 2 cos2x sin x + sin x - 2 sin3x + cos x - 4 cos x sin2x
Answer: D
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Find the integral.
A. 
sec 3 x+ C
B. 
3 + C
C. 
3 + C
D. 
tan x6 + C
Solve the problem.A local bank advertises that it pays interest on savings accounts at the rate of 3% compounded monthly. Find the effective rate. Round answer to two decimal places.
A. 3.44% B. 3.40% C. 3.04% D. 36%
Find the product.5(3x + 7)
A. 105x B. 15x + 7 C. 15x + 35 D. 3x + 35
The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using back-substitution.
A. {(9 - 6z, -9 + 2z, z)} B. {(9 - z, -9 + z, z)} C. {(9, -9, z) } D. {(9 + 6z, -9 - 2z, z)}