What is 8 to the power of 3 minus 9 times 2 divided by 3

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 cot x if sin x cot x csc x = √2

What are the domain and range of f(x)= -log5(x+2)