diketahui segitiga PQR siku-siku di Q. jika sudut R =30° dan QR =12cm , hitunglah:
a. luas segitiga PQR
b.
[tex] {sin}^{2} \: p + {cos}^{2} r[/tex]
a. luas segitiga PQR
b.
[tex] {sin}^{2} \: p + {cos}^{2} r[/tex]
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