**II. Menu Keys - Keys that offer
choices**

F. VECTRA vector on the TI-86 is a one-dimensional array that can be arranged in either one row or one column with real or complex elements. When you create a vector it is stored to the name you give it.

It is unlikely you will work with vectors in algebra or trigonometry. You may work with elementary vectors in a precalculus class. In this section we will look at a few basic vector operations.

Example: Create two vectors LSU=<-3,2,-1> and TIGERS=<5,-2,4>. Find the dot product and the cross product of the two vectors. Find the unit vector for LSU and the normal vector for TIGERS.

Press

type LSU, press

Change dimension to

3 and enter

the values. Clear the screen.

Press . Press

type TIGERS, press

Change dimension to

3 and enter

the values. Clear the screen.

Press . Press

and to

find the dot product. Access the names.

. The dot product

is -23. Press . Access the names.

. The cross product

is the vector

<6,7,-4>. Clear the screen.

Press

. Press

to find the unit vector. Press

to find the normal vector.Remember:

Dot product=value

Cross Product=vector.