tolong bantu yaa no 1 dan 3 secepatnya ditunggu terimakasih

Nomor 1

[tex] \frac{PQ}{sin R}= \frac{QR}{sin P} = \frac{PR}{sin Q} \\ \\ PQ = \frac{QR}{sin P} .sin R = \frac{PR}{sin Q} .sin R[/tex]
Jawaban: A

Nomor 2
[tex] \frac{AC}{sin B} = \frac{BC}{sin A} \\ \\ AC = \frac{BC}{sin A}.sin B \\ \\ AC = \frac{12}{sin 60} .sin 45 = \frac{12}{ \frac{1}{2} \sqrt{3} } . \frac{1}{2} \sqrt{2} = \frac{12 \sqrt{2} }{ \sqrt{3} } = \frac{12 \sqrt{2} }{ \sqrt{3} } . \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{12 \sqrt{6} }{3} = 4 \sqrt{6} [/tex]
Jawaban: C