Write the complex number in trigonometric form r(cos ? + i sin ?), with ? in the interval [0°, 360°).4i
A. 4(cos 90° + i sin 90°)
B. 4(cos 0° + i sin 0°)
C. 4(cos 270° + i sin 270°)
D. 4(cos 180° + i sin 180°)
Answer: A
Mathematics
You might also like to view...
Solve the problem.Find the sum of the infinite series 1 + 6r + 3r2 + 6r3 + r4 + 6r5 + 3r6 + 6a7 + r8 . . . for those values of r for which it converges.
A. 
B. 
C. 
D. 
Mathematics
Show that the set has cardinal number ?0 by establishing a one-to-one correspondence between the set of counting numbers and the given set. Be sure to show the pairing of the general terms in the sets.
A.
| { | 1, | 2, | 3, | 4, | ..., | n, | ...} |
| ? | ? | ? | ? | ? |
B.
| { | 1, | 2, | 3, | 4, | ..., | n, | ...} |
| ? | ? | ? | ? | ? |
C.
| { | 1, | 2, | 3, | 4, | ..., | n, | ...} |
| ? | ? | ? | ? | ? |
D.
| { | 1, | 2, | 3, | 4, | ..., | n, | ...} |
| ? | ? | ? | ? | ? |
Mathematics
Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 5
B. 
C. 54
D. 
Mathematics
Solve the formula for the specified variable.P = 
for t
A. t = P - Ar
B. t = 
C. t = 
D. t = 
Mathematics