Pertanyaan

Buktikan: b. 4 sin 1 8 ∘ cos 3 6 ∘ sin 5 4 ∘ = 1 + 2 sin 1 8 ∘ − cos 3 6 ∘

Buktikan:

b. $4 sin 1 8^{\circ} cos 3 6^{\circ} sin 5 4^{\circ} = 1 + 2 sin 1 8^{\circ} - cos 3 6^{\circ}$

S. Nur

Master Teacher

Jawaban terverifikasi

Jawaban

terbukti bahwa .

terbukti bahwa 4 space sin space 18 degree space cos space 36 degree space sin space 54 degree equals 1 plus 2 space sin space 18 degree minus cos space 36 degree

4 space sin space 18 degree space cos space 36 degree space sin space 54 degree equals 1 plus 2 space sin space 18 degree minus cos space 36 degree

Pembahasan

Ingat kembali: Akan dibuktikan . Maka: Jadi, terbukti bahwa .

Ingat kembali:

2 space sin space straight alpha space cos space straight beta equals sin space open parentheses straight alpha plus straight beta close parentheses plus sin space open parentheses straight alpha minus straight beta close parentheses sin space open parentheses 90 degree minus straight A close parentheses equals cos space straight A

Akan dibuktikan 4 space sin space 18 degree space cos space 36 degree space sin space 54 degree equals 1 plus 2 space sin space 18 degree minus cos space 36 degree . Maka:

Jadi, terbukti bahwa 4 space sin space 18 degree space cos space 36 degree space sin space 54 degree equals 1 plus 2 space sin space 18 degree minus cos space 36 degree .