Question

me ajudem por favor... preciso dessas respostas pois vou fazer uma prova​

Answer 1

Explicação passo a passo:

Lei do seno

a)

${3\sqrt{2} \over sen60^{\circ}}={x\over sen45^{\circ}}\\ \\ {3\sqrt{2} \over{\sqrt{2} \over2}}={x\over{\sqrt{2} \over2}}\\ \\ x.{\sqrt{2} \over2}=3\sqrt{2}.{\sqrt{2} \over2}\\ \\ x.{\sqrt{2} \over\not2}={3.\sqrt{4} \over\not2}\\ \\ x={3\sqrt{4} \over\sqrt{2} }\\ \\ \large\bf x=3\sqrt{2} }$

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b)

${x\over sen30^{\circ}}={8\over sen45^{\circ}}\\ \\ {x\over{1\over2}}={8\over{\sqrt{2} \over2}}\\ \\ x.{\sqrt{2} \over2}={8\times{1\over2}}\\ \\ x.{\sqrt{2} \over2}=4\\ \\ x=4.{2\over\sqrt{2} } }\\ \\ x={8\over\sqrt{2} }\\ \\ racionalizar\\ \\ x={8\sqrt{2} \over2}\\ \\ \large\bf x=4\sqrt{2} }$

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c)

${x\over sen45^{\circ}}={10\over sen30^{\circ}}\\ \\ {x\over{\sqrt{2} \over2}}={10\over{1\over2}}\\ \\ {1\over\not2}.x=10.{\sqrt{2} \over\not2}\\ \\ \large\bf x=10\sqrt{2} }$