Find all cube roots of the complex number. Leave answers in trigonometric form.125i

A. 5 cis 30°, 5 cis 150°, 5 cis 270°
B. 5 cis 60°, 5 cis 180°, 5 cis 300°
C. 1, -1, -i
D. 5 cis 0°, 5 cis 120°, 5 cis 240°


Answer: A

Mathematics

You might also like to view...

Factor completely.8a4 - 50b2

A. 2(2a2 + 5b)(2a2 - 5b) B. 2(2a2 - 5b)2 C. Prime D. 2(2a2 + 5b)2

Mathematics

Find the derivative of y with respect to x.y = 2x3 sin-1 x

A.  + 6x2
B.  + 6x2 sin-1 x
C.  + 6x2 sin-1 x
D.

Mathematics

Solve the problem.For what values of x can we replace cos x by  with an error of magnitude no greater than 

A. -0.600 ? x ? 0.600 B. -0.682 ? x ? 0.682 C. -0.436 ? x ? 0.436 D. -0.378 ? x ? 0.378

Mathematics

Use the formula for the nth term of a geometric sequence to find the indicated term of the sequence with the given first term, a, and common ratio, r.Find a8 when a = 40,000, r = -0.1.

A. 0.0004 B. -0.004 C. -0.04 D. 0.004

Mathematics