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cos(60) = x/9
1/2 = x/9
2x = 9
x = 9/2
9² = x² + y²
81 = 81/4 + y²
324 = 81 + 4y²
4y² = 324 - 81 = 243
y² = 243/4
y = √243/2 = 9√3/2
resposta
um cateto mede 9/2 e outro 9√3/2
pronto
Os catetos sao, respectivamente, 9*cos60 e 9*sen60
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cos(60) = x/9
1/2 = x/9
2x = 9
x = 9/2
9² = x² + y²
81 = 81/4 + y²
324 = 81 + 4y²
4y² = 324 - 81 = 243
y² = 243/4
y = √243/2 = 9√3/2
resposta
um cateto mede 9/2 e outro 9√3/2
pronto
Os catetos sao, respectivamente, 9*cos60 e 9*sen60
Http://www.sketchtoy.com/47027532