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Glossary Math & Statistics

Trigonometry

Trigonometry relates the angles of a triangle to the ratios of its sides through sine, cosine and tangent.

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In more detail

In a right triangle sin = opposite / hypotenuse, cos = adjacent / hypotenuse and tan = opposite / adjacent. In a 3-4-5 triangle the angle opposite the side 4 is atan(4/3) = 53.13°. Check your calculator is in degree or radian mode as intended.

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See also

  • Glossary Pythagorean theorem
    In a right triangle the square of the hypotenuse equals the sum of the squares of the other two sides: `a² + b² = c²`.
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