CosA+cosB+cosC+cos(A+B+C)= cos(A+B).cos(B+C).cos(C+A)

What is the equation of the graph below? y=sec(x)-4

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

15 points! write the slope-intercept form of the equation of the line through the given point with the given slope. use y-y = m(x-x) to solve. through (2,5) slope= undefined