If an angle formed by perpendicular lines has a ray in its interior coming from the vertex of the right angle, what do we call the relationship of the two angles? select one: a. right angles b. corresponding angles c. alternate interior angles d. complementary angles

The ray divides one of the right angles into two smaller angles, but we are not told whether or not the smaller angles are equal or unequal.  These two angles are complementary angles.  Why? Because their sum is 90 degrees (definition of complementary angles).

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.