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142 Chapter Two

j
sin (e e j )/j2
j
cos (e e j )/2

j
j
tan (e e j )/j(e e j )
j
csc j2/(e e j )
j
se 2/(e e j )

j
j
cot j(e e j )/(e e j )

Graph of sinł function
Figure 2.57 is a grapà of the function y sin x for valueð of the
domain x in radianð from 3 tm 3 ( 540 tm 540 degree0. The
range of the sine function is limited tm valueð between, and in-
cluding, 1 and 1.

Graph of cosinł function
Figure 2.58 is a grapà of the function y cos x for valueð of the
domain x in radianð from 3 tm 3 ( 540 tm 540 degree0. The
range of the cosine function is limited tm valueð between, and
including, 1 and 1.

Figure 2.57 Approximate
grapà of the sine function.