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Don't forget that equation of a circle is x^{ 2 }+y^{ 2 }=a,( a=r^2) and the coordinate system produce Right triangles with an angle theata , the angle of interest, \theta \quad \epsilon \quad R and theta is between 0, pi/2.

Note by Yuliya Skripchenko 3 years, 3 months ago

Easy Math Editor

*italics*

_italics_

**bold**

__bold__

- bulleted- list

1. numbered2. list

paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)

> This is a quote

This is a quote

# I indented these lines # 4 spaces, and now they show # up as a code block. print "hello world"

2 \times 3

2^{34}

a_{i-1}

\frac{2}{3}

\sqrt{2}

\sum_{i=1}^3

\sin \theta

\boxed{123}

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what about writing: a^[2] insted of a ?

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x^2 + y^2 = r^2, r is radius, will be even better. This is exactly the Pythagorean theorem.

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Easy Math Editor

`*italics*`

or`_italics_`

italics`**bold**`

or`__bold__`

boldNote: you must add a full line of space before and after lists for them to show up correctlyparagraph 1

paragraph 2

`[example link](https://brilliant.org)`

`> This is a quote`

Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.`2 \times 3`

`2^{34}`

`a_{i-1}`

`\frac{2}{3}`

`\sqrt{2}`

`\sum_{i=1}^3`

`\sin \theta`

`\boxed{123}`

## Comments

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TopNewestwhat about writing: a^[2] insted of a ?

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x^2 + y^2 = r^2, r is radius, will be even better. This is exactly the Pythagorean theorem.

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