To use a function, type the letters that represent the function, and then surround the expression in that function with parentheses. For example, to represent the square root of 4*a+b4*a+b, type sqrt(4*a+b).

You can use the following functions:

• Common functions:
  • sqrt
  • log10
  • log2
  • ln
  • exp
  • abs
• Trigonometric functions and their inverses, as well as hyperbolic trigonometric functions and their inverses:

• Factorials: Enter factorials as fact(3) or factorial(3). You must use integers. For example, you cannot enter fact(1.5).
• A “parallel resistors” operator (||). For example, 1 || 2 represents the resistance of a pair of parallel resistors (of resistance 1 and 2 ohms), evaluating to 2/3 (ohms).

For more information, see Entering math expressions in assignments or the calculator, or Entering math expressions in course discussions.