Divide the Complex Numbers Below and Leave the Result in Trigonometric

question 51

Multiple Choice

Divide the complex numbers below and leave the result in trigonometric form. $$\frac { 4 ( \cos ( 7 \pi / 10 ) + i \sin ( 7 \pi / 10 ) ) } { 10 ( \cos ( 3 \pi / 7 ) + i \sin ( 3 \pi / 7 ) ) }$$

• A) \(\cos \frac { 79 } { 70 } \pi + i \sin \frac { 79 } { 70 } \pi\) ​
• B)​ \(\cos \frac { 19 } { 70 } \pi + i \sin \frac { 19 } { 70 } \pi\)
• C)​ \(\frac { 2 } { 5 } \left( \cos \frac { 79 } { 70 } \pi + i \sin \frac { 79 } { 70 } \pi \right)\)
• D)​ \(\frac { 2 } { 5 } \left( \cos \frac { 2 } { 35 } \pi + i \sin \frac { 2 } { 35 } \pi \right)\)
• E)​ \(\frac { 2 } { 5 } \left( \cos \frac { 19 } { 70 } \pi + i \sin \frac { 19 } { 70 } \pi \right)\)

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An agreement between parties spoken aloud and not recorded in written form, yet legally binding under certain circumstances.

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Oral Contract

An agreement between parties spoken and agreed to aloud rather than written, yet is legally binding.

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The benefit, interest, right, or profit involved in an agreement or contract, on which it is based.