HW3: Imaginary Numbers, Impedance

  • Due Jan 30, 2018 by 11:59pm
  • Points 135
  • Submitting an external tool
  • Available until Jan 31, 2018 at 11:59pm
This assignment was locked Jan 31, 2018 at 11:59pm.

You can do this assignment as many times as you like until the close date.

Use Firefox

There are several question types. At the bottom of the question or under the answer box when you click on it, it will tell you what kind of answer is expected. Here are the types:

  • Number: You will be asked to enter a number, like 3, 5.5, or -6
  • Calculated: You will be asked to enter a number, or a calculation, like 2/3, 5^2, or sin(2). You can press the "Preview" button to ensure that the system is interpreting your answer the way you intended.
  • Multiple-Choice: You will be given a set of choices, and asked to select the correct choice
  • Multiple-Answer: You will be given a set of choices, and asked to select all the correct choices
  • Matching: You will be given a list of items with input boxes in front of them. In each box, enter the letter of the item in the right-hand column that matches that item
  • Function: You will be asked to enter a function, like "sin(x)" or "3x^2-5" or "x^2/5". Make sure you use the same variables in your answer than were specified in the question. You can press the "Preview" button to ensure the system is interpreting your answer the way you intended. It will also check to make sure that it understands your answer, and will tell if you if the syntax is ok.
  • String: You will be asked to enter a word or list of letters
  • Numerical Matrix: You will asked to enter a matrix of numbers. In some case, a grid of input boxes will be provided for you to enter the values. If not, you will need to enter the matrix in ASCIIMath notation, like [(1,2,3),(4,5,6)] for the 2x3 matrix with first row: 1,2,3
  • Calculated Matrix: Like a numerical matrix, but each entry can be a calculation, like 2/3 or 5^2 or sin(2).

Entering Math

For some types of questions, you need to enter a mathematical expression. The system follows order of operations, so use grouping symbols as much as necessary.

Here is some help on how to enter expressions:

Symbol Meaning
* / + - Multiply, divide, add, subtract
^ Powers. 2^3 = 8.
sqrt Square root. sqrt(4) = 2
( ) Parentheses, for grouping. (2+6)/2 = 4, while 2+6/2 = 5.
e, pi The standard constants
abs Absolute Value. abs(-4) = 4
sin,cos,tan,sec,csc,cot,sinh,cosh Standard trig function. Be sure to enter as sin(2), not sin 2
arcsin,arccos,arctan,arcsinh,arccosh Inverse trig functions. Note arcsec, arccsc, and arccot are not defined
sin^-1, cos^-1, tan^-1 Alternative entry for inverse trig functions. Use like sin^-1(0.5)
ln Natural Logarithm base e
log Common Logarithm base 10
! Factorial
oo Infinity. Those are two lowercase o's, like the middle of the word "look"
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