What is 75.96 rounded to the nearest once place

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 constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

What ia the sum if the first 7 terms of the geometric series