Math Placement Test Equations Exam Questions & Answers 100%Correct

Quadratic Formula - ANSWER -x=-b±√b²-4ac/2a Discriminant - ANSWER -b²-4ac=0 has 1 real solution b²-4ac>0 has 2 Avg Rate of Change for a Function - ANSWER -∆f(x)/∆x lne = - ANSWER -0 Inverse Function - ANSWER -xlogx=xyx 2π - ANSWER -360 Angle Measure - ANSWER -x/y=360/2π sinθ (Def of Circular Function) - ANSWER -y/r cosθ (Def of Circular Function) - ANSWER -x/r tanθ (Def of Circular Function) - ANSWER -y/x What is the period of f(x)=sin(x) - ANSWER -period 2π What is the period of f(x)=cos(x) - ANSWER -period 2π What is the period of f(x)=tan(x) - ANSWER -π Double Angle Formulas sin(2u) - ANSWER -sin(2u)=2sin(u)cos(u) Double Angle Formulas cos(2u) - ANSWER -cos²(u)-sin(u)=1-2sin²(u)=2cos²(u)-1 Law of Sines - ANSWER -sinA/a = sinB/b = sinC/c