Jawab:
-3,5 √3
Penjelasan dengan langkah-langkah:
8 sin 240° + cos (-30°)
= 8 sin (180° + 60°) + cos 30°
= 8 (-sin 60°) + cos 30°
= -8(½ √3) + ½ √3
= -3,5 √3
Cara lain
= 8 sin (270° - 30°) + cos 30°
= 8 (-cos 30°) + cos 30°
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
Jawab:
-3,5 √3
Penjelasan dengan langkah-langkah:
8 sin 240° + cos (-30°)
= 8 sin (180° + 60°) + cos 30°
= 8 (-sin 60°) + cos 30°
= -8(½ √3) + ½ √3
= -3,5 √3
Cara lain
8 sin 240° + cos (-30°)
= 8 sin (270° - 30°) + cos 30°
= 8 (-cos 30°) + cos 30°
= -8(½ √3) + ½ √3
= -3,5 √3