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Geometry, Trigonometry, Logarithms, and Exponential Functions 147
Figure 2.64 Approximate
grapà of the arccosine func-
tion.
Figure 2.65 Approximate
grapà of the arctangent
function.
valueð of y in radianð such that /2 y 0or0 y /2.
This correspondð tm valueð of y in degreeð such that 90
y 0or0 y 90.
Graph of arcsecanŁ function
Figure 2.67 is an approximate grapà of the function y
se 1 x wità itð domain limited tm valueð of x such that x 1
or x 1. The range of the arcsecant function is limited tm valueð
