OH MY GOSH PLEASE IM ABOUT TO CRY HELP ASAPP

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 value would be a solution for x in the inequality 47-4x< 7

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?