it’s wrong you can see the derivate of ln(b²-cos²/a²-cos²) it s not a²-cos²/b²-cos²
it’s wrong you can see the derivate of ln(b²-cos²/a²-cos²) it s not a²-cos²/b²-cos²

Last Activity: 3 Years ago

Last Activity: 3 Years ago

Last Activity: 3 Years ago

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