Question

Rotate the yellow dot to a location of pie radians. After you rotate the angle, determinethe value of cos(pie). to the nearest hundredth.-i already figured out the rotation

Answer 1

Okay, here we have this:

Considering the provided angle, we are going to calculate the requested cosine, so we obtain the following:

Then to obtain the cosine we will review the following image of the unit triangle:

So since pi radians is equal to 180°, we can see in the image that the cosine of 180 degrees is equal to -1, so we finally get that the cosine of the angle is -1.