Jawabanmu

2014-06-09T21:57:25+07:00
2 cos² 45° + sin 60° + cos 150°
=
2 (cos 45° x cos 45°) + sin 60° + cos 150°
= 2 (1/2 akar 2 x 1/2 akar 2) + 1/2 akar 3 + (-1/2akar3)
=2 (1/4x2)
=2 (2/4)
=1
1 5 1