• Matéria: Matemática
  • Autor: renatoevaristoafonso
  • Perguntado 6 anos atrás

Determine o valor de x
a)sem(x-10°)=cos30°

Respostas

respondido por: CyberKirito
0

 \mathsf{cos(30^{\circ})=sen(90^{\circ}-30^{\circ})} \\  \mathsf{ =sen(60^{\circ})}

\mathsf{sen(x-10^{\circ})=cos(30^{\circ})}

\mathsf{sen(x-10^{\circ})=sen(60^{\circ})}\\\mathsf{x-10^{\circ}=60^{\circ}}\\\mathsf{x=60^{\circ}+10^{\circ}}\\\boxed{\boxed{\mathsf{x=70^{\circ}}}}

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