Bantu dong kakk, makasi ya

Bantu dong kakk, makasi ya

Penjelasan dengan langkah-langkah:

3. A.

$(- 20 sqrt{6} )div 49$

Gambar Jawaban

Jawab:

trigonometri
2. ΔABC siku di A
tan B= 2√6/ 5 = AC/AB
AC= 2√6
AB = 5
BC²= AC²+ AB² = 24 + 25 = 49
BC= 7
sin C = AB/BC = 5/7
Cos C= AC/BC = 2√6 / 7

nilai - 2 sin C cos C =
= – 2 (5/7) (2√6/7)
= – 20/49 √6
[A]

3. Δ DEF siku di F
sin E = 5/13
cos E = 12/13
cos E = EF/DE = 12/13
36/DE = 12/13
DE = 36 x 13 / 12
DE= 39