Question

Calcule o valor de x:

Answer 1

a)

Sen60° = CO/h



Sen60° = √3/2

CO = X

h = 18


√3/2 = X/18

2X = 18√3
X = 18√3/2
X = 9√3



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b)

Cos 45° = CA/h



Cos45° = 0,707

CA = 16

h = X




0,707 = 16/X

0,707X = 16
X = 16/0,707
X = 22,63

Answer 2

a)
_x_ = sen60° ⇒ _x_ = _√3_ ⇒ x = _18√3_ ⇒ x = 9√3
 18                       18      2                   2
b)
_16 _ = cos 45° ⇒ _16_ = _√2_ ⇒ x = _32_ ⇒ x = _32√2_ ⇒ x = 16√2
   x                            x          2                 √2              √2√2