2 years ago

In witch quadrant is the number 6 - 8i located on the complex plane?

Mathematics

1 answer:

dangina [55]2 years ago

4 0

4th quadrant The real axis is the x-axis and the imaginary axis is the y-axis.

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Nikitich [7]

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Step-by-step explanation:

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3 years ago

Carmen measured a room to be 10 1/2 feet by 12 5/8 feet. what is the area of the room written as a decimal?

kipiarov [429]

Area = l * w

A = 10 1/2 * 12 5/8

A = 21/2 * 101/8 = 2121/16

A = 132.56 ft²

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3 years ago

Find all solutions to the equation.<br><br> 7 sin2x - 14 sin x + 2 = -5

cestrela7 [59]

$\bf 7sin^2(x)-14sin(x)+2=-5\implies 7sin^2(x)-14sin(x)+7=0 \\\\\\ \stackrel{\textit{notice, this is just }ax^2+bx+c}{\stackrel{\stackrel{ax^2}{\downarrow }}{sin^2(x)}\stackrel{\stackrel{bx}{\downarrow }}{-2sin(x)}\stackrel{\stackrel{c}{\downarrow }}{+1}}=0\implies [sin(x)-1][sin(x)-1]=0 \\\\\\ sin(x)-1=0\implies sin(x)=1\implies \measuredangle x=sin^{-1}(1)\implies \measuredangle x=\cfrac{\pi }{2} \\\\\\ ~~~~~~~~~~~~~~\stackrel{\textit{and for all solutions using }n \in \mathbb{Z}}{\cfrac{\pi }{2}+2\pi n}$