Jawab:
Segitiga
Trigonometri
Aturan Cosinus
Penjelasan dengan langkah-langkah:
ΔABC
AB= 2√19, BC = 6 , AC = 4
sisi terpanjang AB= 2√19
sudut terbesar didepan sisi terpanjang (AB) = <ACB
Aturan cosinus
cos ∠ACB = (AC² + BC² - AB² ) / ( 2. AC . BC )
cos ∠ACB = (16 + 36 - 76) / (2. 4. 6)
cos ∠ACB = ( -24) / (48) = - 1/2 = cos 120
<ACB = 120°
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Verified answer
Jawab:
Segitiga
Trigonometri
Aturan Cosinus
Penjelasan dengan langkah-langkah:
ΔABC
AB= 2√19, BC = 6 , AC = 4
sisi terpanjang AB= 2√19
sudut terbesar didepan sisi terpanjang (AB) = <ACB
Aturan cosinus
cos ∠ACB = (AC² + BC² - AB² ) / ( 2. AC . BC )
cos ∠ACB = (16 + 36 - 76) / (2. 4. 6)
cos ∠ACB = ( -24) / (48) = - 1/2 = cos 120
<ACB = 120°