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I have big problem with solve this equation:

[tex]m\frac{d^{2}x}{dt^{2}}+ksinx=0[/tex]

I can't go ahead, because I don't know how solve this

[tex]\frac{dx}{\sqrt{cosx}}=\sqrt{\frac{2k}{m}}dt[/tex]

Phizyk

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# Solution strange, differential equation

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