Page 8 - modul 3.8

0
0
0
a. Sin 120 = Sin (90 + 30 )
0
= Sin 30
1
= 3
2
Atau
0
0
0
Sin 120 = Sin (180 – 60 )
0
= Sin 60
1
= 3
2
0
0
0
b.Cos 225 = Cos (270 – 45 )
0
= -Sin 45
1
=  2
2
Atau

0
0
0
Cos 225 = Cos (180 + 45 )
0
= -Cos 45
1
=  2
2
0
0
0
c. Sin 750 = Sin (2.360 + 30 )
0
= Sin 30
1
=
2
0
0
d.Sin (-225 ) = - Sin 225
0
0
= - Sin(180 + 45 )
0
= - (-sin 45 )
1
= 2
2