Find the exact values of the cosine and sine of the angle. Then find the decimal values.
0 = 135°
To find the exact values of the cosine and sine of 135 degrees, we can refer to the unit circle.
In the unit circle, an angle of 135 degrees is in the third quadrant. In the third quadrant, the cosine value is negative and the sine value is also negative.
So, the exact value of the cosine of 135 degrees is -sqrt(2)/2 and the exact value of the sine of 135 degrees is -sqrt(2)/2.
To find the decimal values, we can calculate them using a calculator.
The decimal value of the cosine of 135 degrees is approximately -0.707
The decimal value of the sine of 135 degrees is also approximately -0.707