**"What is the sine of 60 degrees?"**, I strongly recommend reading the post "Why is the sine of 30 degrees equal to half one?".

## Height of an equilateral triangle

Height of an equilateral triangle |

After that, I will not turn anything. I'll just remove half of the drawing.

## Cosine 60 degrees

Cosine 60 degrees |

The base of this triangle is equal to

**1/2**and is also equal to

**the cosine of an angle of 60 degrees**.

## Sine 60 degrees

Sine 60 degrees |

**The sine of 60 degrees**is equal to the square root of three divided by two. It is calculated in the same way as the cosine of 30 degrees.

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