Hasil 2 sin 210° + cos 240° - sin 330° adalah....
Matematika
ditha93
Pertanyaan
Hasil 2 sin 210° + cos 240° - sin 330° adalah....
2 Jawaban
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1. Jawaban alfiieyyah
2sin210 + cos 240 - sin 330
sin210.cos 210 + cos 240- sin 330
sin(180+30).cos(180+30) + cos (180+60)-sin (360-30)
-sin30.-cos30+ (-cos60) - (-sin 30)
-1/2.-1/2√3+(-1/2) - (-1/2)
-1/2.-1/2√3 + 0
1/4√3 -
2. Jawaban Anonyme
Bab Trigonometri
Matematika SMA Kelas X
2 . sin 210° + cos 240° - sin 330° = 2 . (-1/2) + (-1/2) - (-1/2)
= -1 - 1/2 + 1/2
= -1