CHAPTER 4. TRIGONOMETRY- fåîÉêëÉ=`çëÉÅ~åí=cìåÅíáçå==
( ][) K
OIM MI
O
ó ~êÅÅëÅñIñ I N NI I~êÅÅëÅñ
∪ π
= ∈−∞− ∪ ∞ ∈−π=
=
Figure 71.
=
=4.18 Principal Values of Inverse
Trigonometric Functions
472.
ñ= M= O
N
=
O
O
=
O
P
N=
~êÅëáåñ= M°= PM°= QR°= SM° VM°
~êÅÅçëñ= VM° SM°= QR°= PM° M°=ñ=
ON
−
O
O
−
O
P
− −N= =
~êÅëáåñ=−PM°
=
−QR° −SM°
−VM°
=
=
~êÅÅçëñ=