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| Wow! Thanks. |
| I tried y"+y(a-b(sqrt(c-y^2)))=0 y"+y(a-b(c-y^2)^.5)=0 y"+y(a-b[sqrt(c-y^2)])=0 etc., But Wolfram Alpha wouldn't solve the equation and, for many of the attempts, interpreted the input as an equation in y(c). What am I doing... |
| I hope this is the correct forum for this question. I typed in: x''+9x=sinx [also tried x''(t)+9x(t)=sin(x(t)), same result] into Wolfram Alpha but it timed out, so I finally relented and purchased the Wolfram Alpha Pro subscription on the... |