Question

Чему равен синус(-225 градусов)??

Answer 1

 sin225 = sin (180+45) = -sin45=-`\/2/2 cos225=cos(180+45)= -cos45=-V2 /2.

Answer 2

sin (-225)=- sin225=  - sin (360-135)= sin135= sin(90+45)= cos 45=корень из 2 делить на 2

Answer 3

Синус угла -225 градусов равен -√2/2.

To find the value of the sine of -225 degrees, we can use the periodicity of the sine function. The sine function has a period of 360 degrees, which means that the sine of an angle is equal to the sine of that angle plus or minus any multiple of 360 degrees.

Since -225 degrees is equivalent to 360 degrees minus 225 degrees, we can rewrite -225 degrees as 360 degrees - 225 degrees = 135 degrees.

The sine of 135 degrees is equal to -√2/2 Therefore, the sine of -225 degrees is also equal to -√2/2.

Answer

The sine of -225 degrees is -√2/2.