SOLUTION: Can you help me convert this to trigonometric form? {{{ z = -9/4 }}}+{{{ 9 sqrt( 3 )/4 }}}i A.) 81/4(sin120 + i cos120) B.) 81/4(cos120 + i sin120) C.) 9/2(cos120 + i sin120) D

SOLUTION: Can you help me convert this to trigonometric form? {{{ z = -9/4 }}}+{{{ 9 sqrt( 3 )/4 }}}i A.) 81/4(sin120 + i cos120) B.) 81/4(cos120 + i sin120) C.) 9/2(cos120 + i sin120) D

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Question 1072041: Can you help me convert this to trigonometric form? +i
A.) 81/4(sin120 + i cos120)
B.) 81/4(cos120 + i sin120)
C.) 9/2(cos120 + i sin120)
D.) 9/2(cos120 + i sin 90)
Thank you.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

Recognize that theta is in QII (cos negative, sin positive).
Recognize also that is the required form.

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