Can you answer this question 7045/15 i really need on that.

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

Find the values of y: 3y^3(y^2+ 2/3y)=0

The function show two sisters' savings account and the rate at which they plan to deposit money