Question

Jawab dong skalian jalannya

Answer 1

Verified answer

Trigonometri
Aturan Sinus pada segitiga

Dari segitiga tersebut berlaku aturan sinus:

b / sin B = a / sin A
b / sin 45° = a / sin 30°
b / ½√2 = a / ½
b = a√2
a = b/2 √2

Karena diketahui a + b = 10
b/2 √2 + b = 10
b(½√2 + 1) = 10
b = 10/(½√2 + 1) = 20/(√2 + 2)
b = 20/(√2 + 2) × (√2 - 2)/(√2 - 2)
b = 20(√2 - 2)/(-2)
b = 20 - 10√2 ✔️

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