Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Answer: D
You might also like to view...
Solve the problem.A size 8 dress in Country C is size 56 in Country D. A function that converts dress sizes in Country C to those in Country D is 
Find the inverse function.
A. f-1(x) = 
B. f-1(x) = x - 20
C. f-1(x) = 
- 20
D. f-1(x) = 
+ 20
Find the particular solution to the given differential equation that satisfies the given conditions.2(x dy + y dx) + 15x2 dx = 0; x = 1 when y = 4
A. 2xy + 5x3 = c B. 2xy + 5x3 = 7 C. 2xy + 5x3 = 13 D. 2xy + 5x3 = 328
Solve the problem. Round to the nearest tenth.Find the percent increase (or decrease) in net sales from last year to this year for the income statement. 
A. 6.3% decrease B. 6.9% increase C. 6.3% increase D. 6.9% decrease
Rationalize the denominator. Assume that all variables represent nonnegative numbers and that the denominator is not zero.
A. 
B. 
C. 
- 
D. 