Perform the Operation and Leave the Result in Trigonometric Form $$\left( \cos 80 ^ { \circ } + i \sin 80 ^ { \circ } \right) \left( \cos 330 ^ { \circ } + i \sin 330 ^ { \circ } \right)$$

question 9

Multiple Choice

Perform the operation and leave the result in trigonometric form.​ $$\left( \cos 80 ^ { \circ } + i \sin 80 ^ { \circ } \right) \left( \cos 330 ^ { \circ } + i \sin 330 ^ { \circ } \right)$$ ​

• A) \(\cos 50 ^ { \circ } - i \sin 50 ^ { \circ }\)
• B)​ \(\frac { 1 } { 2 } \left( \cos 50 ^ { \circ } - i \sin 50 ^ { \circ } \right)\)
• C)​ \(\frac { 1 } { 2 } \left( \cos 80 ^ { \circ } + i \sin 80 ^ { \circ } \right)\)
• D)​ \(\frac { 1 } { 2 } \left( \cos 50 ^ { \circ } + i \sin 50 ^ { \circ } \right)\)
• E)​ \(\cos 50 ^ { \circ } + i \sin 50 ^ { \circ }\)