Find all cube roots of the complex number. Leave answers in trigonometric form.-6
- 6i
A. 
cis 70°, 
cis 190°, 
cis 310°
B. 
cis 70°, 
cis 190°, 
cis 310°
C. 
cis 70°, 
cis 190°, 
cis 310°
D. 
cis 80°, 
cis 200°, 
cis 320°
Answer: C
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Find the exact values of the indicated trigonometric functions. Write fractions in lowest terms.
Find sin A and cos A.
A. sin A = 
; cos A = 
B. sin A = 
; cos A = 
C. sin A = 
; cos A = 
D. sin A = 
; cos A = 
Calculate 
.A = 
A. -289 B. 289 C. -189 D. 89
The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).2xy = 5
A. r2 sin 2? = 5 B. r2 sin 2? = 10 C. r2 cos ? sin ? = 10 D. 2r cos ? sin ? = 5
Solve the problem.A company has three products that fluctuate in favorability. The payoff matrix for the expected profit in tens of thousands of dollars is given below. What are the percentages of each product that the company should make that would maximize the expected value of the profit? Round to the nearest tenth of a percent, if necessary. 
A. Product #1: 0%, Product #2: 100%, Product #3: 0% B. Product #1: 100%, Product #2: 0%, Product #3: 0% C. Product #1: 38.5%, Product #2: 61.5%, Product #3: 0% D. Product #1: 30.8%, Product #2: 69.2%, Product #3: 0%