Simplify.cos(4x + 5y) - cos(4x - 5y)
A. -2 cos 4x sin 5y
B. 2 cos 4x cos 5y
C. 2 sin 4x sin 5y
D. -2 sin 4x sin 5y
Answer: D
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Solve the problem.The Habers purchase a $7000 living room set, putting $500 down and agreeing to pay $350.50 each month for 2 years. After 14 payments, they decide to pay off the note. How much is saved in interest? How much is needed to pay the balance of the loan?
A. $350.53, $3154.47 B. $353.37, $3152.13 C. $351.71, $3153.79 D. $357.65, $3147.85
Find the integral using an appropriate trigonometric substitution.
Solve the triangle. If no solution exists, say so.
side a = 228 km side b = 370 km side c = 209 km
Form a polynomial whose zeros and degree are given. Use a leading coefficient of 1. Zeros: -3, -2, 2; degree 3
A. f(x) = x3 - 3x2 + 4x - 12 B. f(x) = x3 + 3x2 - 4x - 12 C. f(x) = x3 + 3x2 + 4x + 12 D. f(x) = x3 - 3x2 - 4x + 12