Penjelasan dengan langkah-langkah:

Gunakan teknik segitiga istimewa.

1. Cos α = samping/miring, maka :

Cos 45° = 27/t

½ akar 2 = 27/t

(akar 2)/2 = 27/t

t = (27 × 2)/(akar 2)

t = 54/(akar 2)

t = (54 × akar 2)/(akar 2 × akar 2) (merasionalkan penyebut)

t = (54 akar 2)/2

t = 27 akar 2 cm.

s² = t² - 27²

s² = (27 akar 2)² - 729

s² = (729 × 2) - 729

s² = 1.458 - 729

s² = 729

s = akar 729

s = 27 cm.

2. Cos α = samping/miring, maka :

Cos 60° = x/26

½ = x/26

x = 26/2

x = 13 cm.

y² = 26² - x²

y² = 26² - 13²

y² = 676 - 169

y² = 507

y = akar 507 cm.

3. Sin α = depan/miring, maka :

Sin 60° = 36/d

½ akar 3 = 36/d

d = (36 × 2)/(akar 3)

d = 72/(akar 3)

d = (72 × akar 3)/(akar 3 × akar 3) (merasionalkan penyebut)

d = (72 akar 3)/3

d = 24 akar 3 cm.

c² = d² - 36²

c² = (24 akar 3)² - 36²

c² = (576 × 3) - 1.296

c² = 432

c = akar 432 cm.

Semoga membantu.