Express the indicated number in standard notation or trigonometric notation, as directed.Express the indicated number in trigonometric notation. 
A. -5(cos 0° + i sin 0°)
B. 5(cos 270° - i sin 270°)
C. 5(cos 90° + i sin 90°)
D. 5(cos 270° + i sin 270°)
Answer: D
Mathematics
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Find the least common multiple (LCM) of the pair of numbers.28 and 40
A. 280 B. 68 C. 4 D. 1120
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Test the equation for symmetry with respect to the given axis, line, or pole.r = 3 sin(3?); the line ? = 
A. Symmetric with respect to the line ? = 
B. May or may not be symmetric with respect to the line ? = 
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Find the indicated intercept(s) of the graph of the function.x-intercepts of f(x) = 
A. (5, 0)
B. 
C. (-5, 0)
D. 
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Perform the indicated operation. Write the result in standard form.(
- 3i)(
+ 3i)
A. 17 B. 14 - 9i C. 23 D. 14 + 9i
Mathematics