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3 years ago

Best Answer Gets Brainliest

Mathematics

2 answers:

Assoli18 [71]3 years ago

6 0

<h3>Answer:</h3>

<u>Area of triangle = 1/2 × b × h</u>

1/2 × 11 × 6
11 × 3
33in²

<u>Area of rectangle = l × b</u>

20 × 9.5
190in²

<u>Total Area = Area(Δ) + Area([])</u>

190in² + 33in²
223in²

Zarrin [17]3 years ago

5 0

Step-by-step explanation:

area of Triangle = (20 -9) (6) (1/2) = 33 in ^ 2

area of rectangular = 20 x 9.5 = 190 in ^2

total = 223 in ^2

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4 years ago

What is the complex number z=−3+3√3i represented in polar form?<br><br><br> z=____cis(____)

maks197457 [2]

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Step-by-step explanation:

The general form of a complex number z = x+iy

If x = rcos $\theta$ and y = rsin $\theta$

where r is the modulus of the complex number and $\theta$ is the argument, z in polar form is represented as:

z = rcos $\theta$ + rsin $\theta$

z = r(cos $\theta$ + isin $\theta$ )

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$argument\\\theta = arctan \frac{y}{x} \\\theta = arctan \frac{3\sqrt{3} }{-3} \\\theta = arctan {-\sqrt{3} } \\\theta = -60 \deg$

since the argument is negative and tan is negative in the 2nd and 4th quadrant,

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On substituting r and theta, the complex number in polar form is expressed as 6cis120°

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4 years ago