Tolong jelasin dapat nilai dari
150° + sin 120° / cos 210° - cos 300° satu-satu ....!!!
1. Nilai sin 150° + sin 120° / cos 210° - cos 300° = .....
A. 2
B. 1
C. 0
D. - ½
E. -1
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x =
x = ∞
sin 120 = sin ( 180- 60 ) = sin 60
cos 210 = cos ( 180 + 30 ) = -cos 30
cos 300 = cos ( 360 - 60 ) = cos 60 .....
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