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Pelajaran: Matematika
Kategori: Trigonometri
Kata Kunci: sudut istimewa, operasi trigonometri
Kode: 10.2.6 [Kelas 10 SMA Matematika Bab 6 Trigonometri]
Pembahasan:
Nomor 6 dan 7 sudah benar. Nomor 8 terdapat kesalahan perhitungan. Mari kita ulas kembali.
Nomor 9
3 sin 30° - 4 sin 30° = 3 . - 4 .
= -
= -
Nomor 10
4 cos⁴ 30° - 3 csc 30° = 4 . ⁴ - 3 . 2
= - 6
= -3