8friends share 4 sheets of construction paper equally.

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

Solve the equation - 2(m -30) = -6m a-15 b-13 c-8 d8

Which function has the domain x> -11