[C.16] Identity Matrix

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Taught by TheMathDude
  • Currently 4.0/5 Stars.
7290 views | 1 rating
Meets NCTM Standards:
Features a TI Calculator
Lesson Summary:

In this calculator skill lesson, you will learn how to generate an identity matrix on your graphing calculator, and how to use it in various calculations. The identity matrix is a square matrix with ones on the diagonal and zeros everywhere else. By multiplying a matrix by the identity matrix, you will get the same matrix back, as long as the identity matrix is the same dimension. This is a useful tool in Input/Output analysis and other mathematical calculations.

Lesson Description:

Learn how to generate and use an Identity matrix on a graphing calculator (for example, in Input/Output analysis) (MATRIX/MATH/Identity).

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Questions answered by this video:
  • What is an identity matrix and how do you generate an identity matrix on a TI graphing calculator?
  • How can you make a TI graphing calculator generate an identity matrix of specified dimensions for you?
  • What does the MATH > identity function do on a TI graphing calculator?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson shows you how to force a TI graphing calculator to generate an identity matrix for you, and all you have to do is specify the dimensions. This is a very useful tool so you do not have to manually enter the 1s and 0s yourself each time.