Question

Find the cosine and sine of 180 degrees. Round your answers to the nearest hundredth if necessary.

Answer 1

Sin(180)=0, cos(180)=-1

Answer 2

Answer:

$cos(180\°)=-1$

$sin(180\°)=0$

Step-by-step explanation:

we know that

In the unit circle the coordinates of the point belong to the x-axis for an angle equal to $180\°$ is $(-1,0)$

we have

$x=1\ units, y=0\ units$

Applying Pythagoras theorem

$H=\sqrt{1^{2}+0^{2}} =1$

so

$cos(180\°)=x/H$

substitute

$cos(180\°)=-1/1=-1$

$sin(180\°)=y/H$

substitute

$sin(180\°)=0/1=0$