20
19 17 14 10
A
15
B
7
7
C
9
D
6
E
Ол
5

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

Just tell me how to set up the equation.

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?