Find z1z2. Write your answer in standard polar form with the argument in radians.z1 = 2(cos 39° + i sin 39°), z2 = 5(cos 6° + i sin 6°)
A. 7(cos 234° + i sin 234°)
B. 7(cos 45° + i sin 45°)
C. 10(cos 33° + i sin 33°)
D. 10(cos 45° + i sin 45°)
Answer: D
Mathematics
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Determine whether the pair of lines is parallel, perpendicular, or neither.y = 5x + 1y = -5x - 1
A. parallel B. perpendicular C. neither
Mathematics
If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.r = 17 inches, ? = 
radians, A = ?
A. 302.49 in2 B. 17.79 in2 C. 151.24 in2 D. 8.9 in2
Mathematics
Solve the equation by completing the square.3x2 - 2x - 3 = 0
A. {
, 
}
B. {
, 
}
C. {
, 
}
D. {-3, 
}
Mathematics
Change the number 
from scientific notation to standard form.
a. 0.00458 b. 0.458 c. 458 d. 4580
Mathematics