Question

Cos(-225)градусов ???​

Answer 1

Ответ:

Удачного вам дня С любовью Evgenrybrkin

Пошаговое объяснение:

1) cos 225°=cos(270°-45°)=cos (3π/2-45°)=-sin 45°=-√2/2

Answer 2

To find the cosine of an angle in degrees, you can use a calculator or a trigonometric table. The cosine function (cos) is periodic, so it repeats every 360 degrees.

The angle -225 degrees is equivalent to an angle of 135 degrees because adding 360 degrees to -225 degrees gives us the same angle:

-225 degrees + 360 degrees = 135 degrees

Now, to find the cosine of 135 degrees:

cos(135 degrees) ≈ -0.707

So, cos(-225 degrees) is approximately -0.707.