2.4-(1.2)+6.3+(-4.1)-7.3

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

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?