Question

2)

a) 3/4

b) 1/2

c) 2/3

!!!!!​

Answer 1

Resposta:

Letra b) 1/2

Explicação passo-a-passo:

Cos(60°) + cos(60°) + sen(30°) + cos(60°)

Cos(60°)² + 1/2 × cos(60°)

Cos(60°)² + 1/2 × 1/2

$(\frac{1}{2}) {}^{2} + \frac{1}{2} \times \frac{1}{2}$

$\frac{1}{2} {}^{2} + \frac{1}{4}$

$\frac{1}{4} + \frac{1}{4}$

$\frac{1}{2}$