How are (-5) to the 6th power and 5 to the 6th power alike and how are they different?

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

Which of the binomials below is a factor of this trinominal? x^2-13+30

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b