Perform the indicated operations and write the result in standard form.(-9 - 
)2
A. 81 - 25i
B. 56 + 90i
C. 81 + 25i
D. 106 - 90i
Answer: B
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Simplify the expression.cos(x + ?) cos(? - x) + sin(x + ?) sin(? - x)
A. 1 B. cos(2x + 2?) C. 0 D. sin(2x + 2?)
Provide an appropriate response.The compound amount when an investment is compounded continuously is A = Peni Where A = compound amount, P = original principal, n = # of years, and i = interest rate per year. Find the compound amount of an investment of $2,500 at an interest rate of 10% for 2 years if it is compounded continuously.
A. $3,000.00 B. $3,053.51 C. $4,023.59 D. $3,025.00
Rewrite the following as a product of trigonometric functions.cos 
- cos 
A. -2 sin 
sin
B. -2 cos 
sin
C. -2 cos 
cos
D. -2 sin 
cos
Factor completely.(x + y)3 + (x - y)3
A. 2x(x2 - 3y2) B. x(x2 - 3y2) C. 2x(x2 + 3y2) D. x(x2 + 3y2)