Řešení - Trigonometry

- \cos (75 °)

-\cos(75\degree)

Vysvětlení krok za krokem

Reflecting the number with respect to 360 degrees.

$\cos (255 °) = \cos (360 - 105 °)$

The period of trigonometric functions is 360 degrees.

$\cos (360 - 105 °) = \cos (360 - 105 - 360 °)$

Removing or simplifying the same numbers on the top and bottom of a fraction.

$\cos (360 - 105 - 360 °) = \cos (- 105 °)$

Computing the cosine of a negative angle.

$\cos (- 105 °) = \cos (105 °)$

Reflecting the number with respect to 360 degrees.

$\cos (105 °) = \cos (180 - 75 °)$

Reflecting the cosine function with respect to 180 degrees.

$\cos (180 - 75 °) = - \cos (75 °)$

Bylo toto vysvětlení užitečné?

How did we do?

Learn more with Tiger

Goniometrie propojuje úhly, délky a periodické děje v matematice i fyzice.