OpึvZฬ๎b:
sin
x
า
sin
(
−
θ
)
=
−
sin
θ
ห
sin
(
π
2
−
θ
)
=
cos
θ
ห
sin
(
π
2
+
θ
)
=
cos
θ
ห
sin
(
π
−
θ
)
=
sin
θ
ห
sin
(
π
+
θ
)
=
−
sin
θ
ห
฿้
[
ณ
]
[
ณs
]
[
๕๘gbv
]