TI-92 Help -- Vectors

• Entering vectors

• The elements of a vector

• The dot product, inner product, or scalar product

• The cross product

Vectors are denoted on the TI-92 using square brackets with commas separating the entries as shown on the screen at the right.
Note: Even though the commas separating the entries of a vector do not appear in the main part of the TI-92 screen you must type them when entering the vector. The screen at the right shows what happens when the commas are omitted.
The individual entries (coordinates) in a vector are denoted as shown in the screen at the right -- the vector is followed by a left square bracket, then 1 and a comma and then the number of the desired coordinate followed by a right square bracket.
Vectors may have real or complex entries as shown on the screen at the right.
The dot product, inner product, or scalar product (these are all synonyms) of two vectors is computed using the procedure dotP as shown in the screen at the right. WARNING: The inner product of two complex vectors is defined differently by different people. The TI-92 uses the definition that is most commonly used by mathematicians.
The screen at the right shows two typical inner product calculations for complex vectors.
The length or magnitude of a vector can be computed using the dot product as shown in the screen at the right.
The screen at the right illustrates how the TI-92 can compute the cross product of two three-dimensional vectors.