# Trigonometry

If you know that cos(γ) = sin (806°), what is the angle γ?

Correct result:

γ =  4 °

#### Solution:

$\gamma =\frac{180}{\pi }\mathrm{arccos}\left(\mathrm{sin}\left(80{6}^{\circ }\right)\right)={4}^{\circ }$

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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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