Question

Tolong dibantu nomor 9 - 10 saja kak :)

#DenganLangkahPenyelesaian

Makasih ^^

Answer 1

Verified answer

TRIGONOMETRI (1)
• Nilai perbandingan trig

9][
3 sin 30° - 4 sin³30°
= 3 • ½ - 4 (½)³
= 1½ - ½
= 1 ✔️

10][
4 cos⁴30° - 3 cos³30°
= 4 • (½√3)⁴ - 3 • (½√3)³
= 4 • 9/16 - 3 • ⅜√3
= 9/4 - 9/8 √3
= 9/8 (2 - √3) ✔️