Respostas

2013-08-17T16:27:19-03:00
cos60=\dfrac{15}{z}
z=\dfrac{15}{cos60}
z=30

cos30=\dfrac{z}{y}
cos30=\dfrac{30}{y}
y=\dfrac{30}{cos30}
y=34,64

sen45=\dfrac{x}{y}
sen45=\dfrac{x}{34,64}
x=sen45\cdot34,64
x=24,49

Assim, a medida de x corresponde aproximadamente a  24,49.
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