## Excel in math and science

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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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TopNewestThere is a triangle ABC. Let O and H be its orthocentre and circumcentre respectively. Its given that AH=AO. Prove that angle BAC is 60°

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Picture of triangle please

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let equation of BC of a triangle ABC be 2x+3y-1 = 0 and coordinates of incentre and circumcentre of ABC are (2,1) and (-1,3) respectively then the value of cosC+cosB = ??

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