## 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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TopNewestPlease someone prove this

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What are the the restrictions on B and C?

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ABC is a triangle and A+B+C =180

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It's easy to prove \(\frac{\sin A} {\cos B \cos C}=\tan B + \tan C\)

Then after some simplification,you will get the required expression as, \(1+\sec A \sec B \sec C\), which is always greater than 2 in case of triangle.

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