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nd write the answer in standard form.

0 votes
Find The quantity of 1 minus i all to the tenth power. and write the answer in standard form. 
A. image
B. image
C. image
D. image
Find Bracket. 2 times the quantity of cosine of 240 degrees + i times sine of 240 degrees. bracket. to the fifth power. and write the answer in standard form. 
A. image
B. image
C. image
D. image
 
asked Oct 20, 2014 in TRIGONOMETRY by tonymate Pupil

2 Answers

0 votes

(1).

The expression is image.

To apply De Moivre’s Theorem, we must first write the complex number in polar form. Since the magnitude of (1 - i) is image, we begin by writing

image

Now

image

image

image

image

image

image

The option A is correct.

answered Oct 20, 2014 by casacop Expert
0 votes

(2).

The expression is image

Apply De Moivre’s Theorem :

image

image

image

image

image

image

image

image

The option C is correct

answered Oct 20, 2014 by casacop Expert

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