Find the equation of the line, Through (14,15); perpendicular to y=5

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

Can someone me i’m confused. will give brainliest and a whole bunch of points

Why did the ice arena get so hot after the big game (this is math related google it to find the paper