Perhatikan gambar berikut

Tentukan
a. sin a
b. cos a
c. tan a
d. cosec a
e. sec a
f. cotan a

Janwab pakai cara ya, kalau gk tahu gk usah di jawab ngasal

Perhatikan gambar berikut

Penjelasan dengan langkah-langkah:

cari BC = √15²-9²=√225-81=√144=12

a. sin a = 9/15=3/5

b. cos a = 12/15=4/5

c. tan a = 9/12=3/4

d. cosec a = 15/9=5/3

e. sec a = 15/12=5/4

f. cotan a = 12/9=4/3

Jawab & Penjelasan dengan langkah-langkah:

Panjang AB = 9 ; Panjang AC = 15

panjang BC = $sqrt{15^{2} - 9^{2} } = sqrt{225-81} = sqrt{144} = 12$

1. sin $alpha$ = AB/AC = 9/15 = 3/5

2. cos $alpha$ = BC/AC 12/15 = 4/5

3. tan $alpha$ = AB/BC = 9/12 = 3/4

4. cosec $alpha$ = 1/ sin $alpha$ = 1/(9/15) = 15/9 = 5/3

5. sec $alpha$ = 1/ cos $alpha$ = 1/(12/15) = 15/12 = 5/4

6. cotan $alpha$ = 1/ tan $alpha$ = 1/(9/12) = 12/9 = 4/3