Use an appropriate identity to find the exact value of the expression.cos 
A. 
- 
B. 
C. 
D. 
- 
Answer: B
Mathematics
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Multiply and simplify.
? 
A. 1
B. 
C. -1
D. 0
Mathematics
Solve the linear programming problem.Minimize z = 13x + 5y + 12 subject to:x ? 0,
y ? 0,
x + y ? 1.
A. minimum: 12 B. minimum: 17 C. minimum: 25 D. minimum: 30
Mathematics
Solve by completing the square.z2 + 4z - 3 = 0
A. -2 ± 2
B. -2 ± 
C. -1 ± 
D. 2 + 
Mathematics
Find all complex roots. Write the answer in polar form, with 0 ? ? ? 360°.Cube roots of 2 + 2i
A. 
(cos 20° + i sin 20°), 
(cos 140° + i sin 140°), 
(cos 260° + i sin 260°)
B. 
(cos 30° + i sin 30°), 
(cos 150° + i sin 150°), 
(cos 270° + i sin 270°)
C. 
(cos 20° + i sin 20°), 
(cos 140° + i sin 140°), 
(cos 260° + i sin 260°)
D. 
(cos 20° + i sin 20°), 
(cos 140° + i sin 140°), 
(cos 260° + i sin 260°)
Mathematics