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Alg. 3/ Trig Winter Exam

STUDY
PLAY
horizontal lines slope =
zero
vertical lines slope =
undefined
parallel lines slopes
are equal
perpendicular lines slopes
are reciprocals of each other
addition/subtraction with matrices
the dimensions have to be the same
multiplying matrices
the number of columns on the first matrix has to be equal to the number of rows of the other matrix
identity matrix
a square matrix (same number of rows and columns) with 1's along along it's main diagonal & 0's elsewhere
inverse matrix
two matrices that have a product of an identity matrix
sine is
y
cos is
x
tan is
y/x
amplitude
1st step in graphing cos/sin graphs - indicates the vertical stretch
period
2nd step in graphing cos/sin graphs - 360 / b - indicates how many waves you will see in 360 degrees
phase shift
3rd step in graphing cos/sin graphs - -c / b
vertical shift
4th step in graphing cos/sin graphs - d
sinx
0 - max - 0 - min- 0
cosx
max - 0 - min - 0 - max
d value added to sinx/ cosx
the y values on the graph