Va rog am nevoie repede

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

What would the rule be for the reflection of y=-3

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?