COD MATH 2231 TEST 1 STUDY 2026/2027 | COMPLETE STUDY GUIDE, PRACTICE QUESTIONS
& EXAM REVIEW
Even function of x - correct answer ✔✔If f(-x) = f(x) (symmetric about the y-axis)
Odd function of x - correct answer ✔✔If f(-x) = -f(x) (symmetric about the origin)
Composite function f•g - correct answer ✔✔(f•g)(x) = f(g(x))
Vertical shifts - correct answer ✔✔y = f(x) + k (k shifts it)
Horizontal Shifts - correct answer ✔✔y = f(x +h) (h shifts it)
Vertical Scaling - correct answer ✔✔y = cf(x) stretches the graph vertically by c
y = 1/c(f(x)) compresses the graph vertically
Horizontal Scaling - correct answer ✔✔y = f(cx) compresses the graph horizontally
y = f(x/c) stretches the graph horizontally
Reflecting Formulas - correct answer ✔✔y = -f(x) reflects the graph across the x-axis
y = f(-x) reflects the graph across the y-axis
Central Angle Formula - correct answer ✔✔s = r(theta) (theta in radians)
Cos2(theta) - correct answer ✔✔Cos^2(theta) - sin^2(theta)
& EXAM REVIEW
Even function of x - correct answer ✔✔If f(-x) = f(x) (symmetric about the y-axis)
Odd function of x - correct answer ✔✔If f(-x) = -f(x) (symmetric about the origin)
Composite function f•g - correct answer ✔✔(f•g)(x) = f(g(x))
Vertical shifts - correct answer ✔✔y = f(x) + k (k shifts it)
Horizontal Shifts - correct answer ✔✔y = f(x +h) (h shifts it)
Vertical Scaling - correct answer ✔✔y = cf(x) stretches the graph vertically by c
y = 1/c(f(x)) compresses the graph vertically
Horizontal Scaling - correct answer ✔✔y = f(cx) compresses the graph horizontally
y = f(x/c) stretches the graph horizontally
Reflecting Formulas - correct answer ✔✔y = -f(x) reflects the graph across the x-axis
y = f(-x) reflects the graph across the y-axis
Central Angle Formula - correct answer ✔✔s = r(theta) (theta in radians)
Cos2(theta) - correct answer ✔✔Cos^2(theta) - sin^2(theta)
