What is 99/00+44(55)99

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

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =