How long will take you to walk 12 miles at 4mph

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 is the quadric regression equation that fits these data

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x