Elizabeth815
Elizabeth815 Elizabeth815
  • 08-04-2020
  • Advanced Placement (AP)
contestada

Find the solution to the differential equation dy/dx = cos(x) / y2 , where y(π/2) = 0.

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ItzBlueish
ItzBlueish ItzBlueish
  • 10-04-2020

Answer:

[tex]y=2\sqrt{\sin \left(x\right)-1},\:y=-2\sqrt{\sin \left(x\right)-1}[/tex]

Explanation:

[tex]\frac{dy}{dx}=\frac{\cos \left(x\right)}{y}2[/tex]

[tex]y'\:=\frac{\cos \left(x\right)}{y}\cdot \:2[/tex]

[tex]yy'\:=2\cos \left(x\right)[/tex]

[tex]yy'\:=2\cos \left(x\right):\quad \frac{y^2}{2}=2\sin \left(x\right)+c_1[/tex]

[tex]\frac{y^2}{2}=2\sin \left(x\right)-2[/tex]

[tex]y=2\sqrt{\sin \left(x\right)-1},\:y=-2\sqrt{\sin \left(x\right)-1}[/tex]

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