Řešení - Trigonometry

The period of trigonometric functions is 360 degrees.

$$\cos \left(1050°\right)=\cos \left(1050-360°\right)$$

Subtracting one integer from another.

$$\cos \left(1050-360°\right)=\cos \left(690°\right)$$

The period of trigonometric functions is 360 degrees.

$$\cos \left(690°\right)=\cos \left(690-360°\right)$$

Subtracting one integer from another.

$$\cos \left(690-360°\right)=\cos \left(330°\right)$$

Reflecting the number with respect to 360 degrees.

$$\cos \left(330°\right)=\cos \left(360-30°\right)$$

The period of trigonometric functions is 360 degrees.

$$\cos \left(360-30°\right)=\cos \left(360-30-360°\right)$$

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

$$\cos \left(360-30-360°\right)=\cos \left(-30°\right)$$

Computing the cosine of a negative angle.

$$\cos \left(-30°\right)=\cos \left(30°\right)$$

Computing the cosine of 30 degrees.

$$\cos \left(30°\right)=\frac{\sqrt{3}}{2}$$