Find the solution of the following equation whose argument is strictly between 90° and 180°.
1 answer:
Answer:
180degreesStep-by-step explanation:
Given the complex value
z² = -81i
z = (-81i)^1/2
Get the argument of -81i
theta = arctan(y/x)
theta = arctan(-81/0)
theta = -90degrees
theta = -π/2
Since tan is negative in the secind quadrant
theta = π - π/2
theta = π/2
According to demoivres theorem
theta = 1/2 * π/2
theta = π
theta = 180degrees
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Answer:
B
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Step-by-step explanation:
you will use the sine rule then 0 = 39.13
<u><em>The correct answer here is d</em></u>
d = 3a + 3b
d - 3a = 3b
d - 3a/3 = b
13 < 17 - x
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hope this helps, God bless!
I don't know how to explain it, but
the answer is 302.24
