Math Placement Test Equations
Questions and Answers
d=√(x₂-x₁)²+(y₂-y₁)² - ANS-Distance Formula
ax²+bx+c=0 - ANS-Quadratic Equation
x=-b±√b²-4ac/2a - ANS-Quadratic Formula
b²-4ac=0 has 1 real solution b²-4ac>0 has 2 - ANS-Discriminant
∆f(x)/∆x - ANS-Avg Rate of Change for a Function
0 - ANS-lne =
xlogx=xyx - ANS-Inverse Function
360 - ANS-2π
x/y=360/2π - ANS-Angle Measure
y/r - ANS-sinθ (Def of Circular Function)
x/r - ANS-cosθ (Def of Circular Function)
y/x - ANS-tanθ (Def of Circular Function)
period 2π - ANS-What is the period of f(x)=sin(x)
period 2π - ANS-What is the period of f(x)=cos(x)
π - ANS-What is the period of f(x)=tan(x)
sin(2u)=2sin(u)cos(u) - ANS-Double Angle Formulas sin(2u)
cos²(u)-sin(u)=1-2sin²(u)=2cos²(u)-1 - ANS-Double Angle Formulas cos(2u)
sinA/a = sinB/b = sinC/c - ANS-Law of Sines
c²=a²+b²-2abcosC - ANS-Law of Cosines
Questions and Answers
d=√(x₂-x₁)²+(y₂-y₁)² - ANS-Distance Formula
ax²+bx+c=0 - ANS-Quadratic Equation
x=-b±√b²-4ac/2a - ANS-Quadratic Formula
b²-4ac=0 has 1 real solution b²-4ac>0 has 2 - ANS-Discriminant
∆f(x)/∆x - ANS-Avg Rate of Change for a Function
0 - ANS-lne =
xlogx=xyx - ANS-Inverse Function
360 - ANS-2π
x/y=360/2π - ANS-Angle Measure
y/r - ANS-sinθ (Def of Circular Function)
x/r - ANS-cosθ (Def of Circular Function)
y/x - ANS-tanθ (Def of Circular Function)
period 2π - ANS-What is the period of f(x)=sin(x)
period 2π - ANS-What is the period of f(x)=cos(x)
π - ANS-What is the period of f(x)=tan(x)
sin(2u)=2sin(u)cos(u) - ANS-Double Angle Formulas sin(2u)
cos²(u)-sin(u)=1-2sin²(u)=2cos²(u)-1 - ANS-Double Angle Formulas cos(2u)
sinA/a = sinB/b = sinC/c - ANS-Law of Sines
c²=a²+b²-2abcosC - ANS-Law of Cosines