Multiply and Divide Complex Numbers Answers
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1
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What is 56(cos(33°) + i sin(33°)) ÷ 7(cos(11°) + i sin(11°))?
A
8(cos(3°) + i sin(3°))B
49(cos(3°) + i sin(3°))C
8(cos(22°) + i sin(22°))D
49(cos(22°) + i sin(22°))2
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What is the product of 16(cos(47°) + i sin(47°)) and 4(cos(12°) + i sin(12°))?
A
20(cos(35°) + i sin(35°))B
20(cos(59°) + i sin(59°))C
64(cos(35°) + i sin(35°))D
64(cos(59°) + i sin(59°))3
For z = –2 + 2i, which graph represents z and –2z?
A
On a coordinate plane, the y-axis is labeled imaginary and the x-axis is labeled real. Point z is (negative 2, 2) and point negative 2 z is (1, negative 1).
B
On a coordinate plane, the y-axis is labeled imaginary and the x-axis is labeled real. Point z is (negative 2, 2) and point negative 2 z is (4, negative 4).
C
On a coordinate plane, the y-axis is labeled imaginary and the x-axis is labeled real. Point z is (negative 2, 2) and point negative 2 z is (negative 1, negative 4).
D
On a coordinate plane, the y-axis is labeled imaginary and the x-axis is labeled real. Point z is (negative 2, 2) and point negative 2 z is (negative 4, negative 4).
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