cos 30°-sin 135° +8 X sin 45°X cos 135°
Matematika
dilla2608
Pertanyaan
cos 30°-sin 135° +8 X sin 45°X cos 135°
1 Jawaban
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1. Jawaban dharmawan14
cos 30° - sin 135° + 8 sin 45° . cos 135°
= (1/2)V2 - (1/2)V2 + 8 (1/2)V2 . (-1/2)V2
= 4V2 . (-1/2)V2
= -2.2
= - 4