# Trigonometry

Is true equality?

$\mathrm{sin}(x+13\pi )=\mathrm{sin}(x)$

**Result**Tips to related online calculators

Most natural application of trigonometry and trigonometric functions is a calculation of the triangles. Common and less common calculations of different types of triangles offers our triangle calculator. Word trigonometry comes from Greek and literally means triangle calculation.

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