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Olenka [21]
3 years ago
10

Rewrite −1 + 2i in polar form.

Mathematics
1 answer:
raketka [301]3 years ago
8 0
The length of the radius would sqrt(1+4), or sqrt(5).
                                                                                           2
The angle would be in Quadrant II and would be arctan ------ , or arctan (-2).
                                                                                           -1

Find this angle using a calculator or table.

Then you end up with -1+2i = sqrt(5) angle arctan(-2).  The angle would be + and measured from the + horizontal axis.
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X = stories of houses.

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3 years ago
Solve the right triangle. Round decimal answers to the nearest tenth.
Korolek [52]

The main question isn't supplied.

Answer:

Kindly check explanation

Step-by-step explanation:

A right - angled triangle is one which has one of its angles being 90°. Once we have a right angled triangle, the rule of Pythagoras can be applied in other to solve problems relating to obtaining sides of the triangle while trigonometric relations including :

Sinθ = opposite / hypotenus

Tanθ = opposite / Adjacent

Cosθ = Adjacent / Hypotenus

To obtain the angle θ; depending on which of the sides are given.

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c² = a² + b²

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5 0
3 years ago
Mean and median of 1024 divided by 16 and of these numbers 34,48,52,61,76,76,61,84,61,39,83,61,79,81,56,88
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8

Step-by-step explanation:

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2 years ago
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8 0
2 years ago
What is y squared + 2 y - 35 / y + 7​
lutik1710 [3]

Answer:

y - 5

Step-by-step explanation:

Given

\frac{y^2+2y-35}{y+7}

Factorise the numerator

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\frac{(y+7)(y-5)}{y+7}

Cancel the factor (y + 7) on the numerator/ denominator, leaving

y - 5

5 0
3 years ago
Read 2 more answers
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