(
)
1
2
1
1
,
sin
2
1
2
2
y
x
x
x
−
=
−
−
<
<
15 1
12
1
,
sec
0
2
1
2
y
x
x
− 

=
<
<

−


5 4  Exponential and Logarithmic Functions
Till now we have learnt some aspects of different classes of functions like polynomial
functions, rational functions and trigonometric functions In this section, we shall
learn about a new class of (related) functions called exponential functions and logarithmic
functions