Question

Determine o valor de X​

Answer 1

Explicação passo-a-passo:

a)

$\sf cos~60^{\circ}=\dfrac{cateto~adjacente}{hipotenusa}$

$\sf \dfrac{1}{2}=\dfrac{x}{30}$

$\sf 2x=30\cdot1$

$\sf 2x=30$

$\sf x=\dfrac{30}{2}$

$\sf x=15$

b)

$\sf cos~60^{\circ}=\dfrac{cateto~adjacente}{hipotenusa}$

$\sf \dfrac{1}{2}=\dfrac{x}{20}$

$\sf 2x=20\cdot1$

$\sf 2x=20$

$\sf x=\dfrac{20}{2}$

$\sf x=10$