How do i graph the circle and so on

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

What is the relationship between all triangles that can be drawn given the same three angles