Ido not understand this math question. if someone can you get 25 points

In degrees: -270°, 90°, 450°.

In radians: -3π/2, π/2, 5π/2.

The cosine is always zero where the sine is 1. The sine is 1 at an angle of 90°, and every integer number of 360° added (or subtracted) to that. The corresponding point on the unit circle is (0, 1), labeled A in the diagram.

The angle from the x-axis to the positive y-axis can be called any of ...

... 90°

... -270°

... 450°

... 810°

... π/2 radians

... -3π/2 radians

... 5π/2 radians

... 9π/2 radians

You are asked to pick three of these (or some others you may choose) so that you have 3 different names for the angle to this point.

_____

Comment on the second figure

The graphing calculator easily shows places where function values are zero. To show where sin(x) = 1, we rewrite it as sin(x) -1 = 0. Then, the zeros are highlighted. In degrees, the ones shown are -270°, 90°, 450°, 810°. You can see that cos(x) is zero at those same angles.

(-1,0) and (4,0) are x-intercepts.

step-by-step explanation:

x-intercepts are all points on the x-axis.

points (-1,0) and (4,0) are both x -intercepts.