PLZ HELP ASAP

Given cos 0 = 4√2/ 7 find sin 0

If an x intercept only touches the x axis it means it has a multiplicity of 2. if an intercept goes through the axis it has a multiplicity of 1 true false

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

Which best describes a central bank's primary goals? limiting inflation and reducing unemployment reducing unemployment and maintaining cash flow controlling stagflation and reducing unemployment managing credit and ensuring the money supply's liquidity