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 May 28 awarded Popular Question May 23 awarded Popular Question Aug 14 awarded Notable Question Jul 14 awarded Notable Question Jul 2 awarded Curious Jun 20 awarded Notable Question Apr 8 awarded Tumbleweed Jun 14 awarded Popular Question May 14 awarded Popular Question Jan 19 awarded Popular Question Aug 15 asked What is a cyclic integral? Jul 27 awarded Yearling Jul 6 comment How can I find the area of the shadow? It is easy to see that the shadow is circle with center at C and radius EC or CD I'm sorry I do not see how this is the case. As @JosuéMolina mentioned, why can't it be an oval? Jul 6 comment How can I find the area of the shadow? @BenMillwood I'm sure the shape changes but the area might be constant. Jul 6 asked How can I find the area of the shadow? Jun 8 awarded Caucus Feb 1 comment Solve $\theta''+g\sin(\theta)=0$ @yoyo I simplified a step further & got this equation : $\frac{d\theta}{\sqrt{2C+2gcos\theta}}=dt$ I'm not sure I can integrate this. Feb 1 awarded Commentator Feb 1 comment Solve $\theta''+g\sin(\theta)=0$ Thanks. Seems obvious now that you have shown it. Feb 1 comment Solve $\theta''+g\sin(\theta)=0$ Can you explain how it is in separable form? I'm a beginner so please bear with me..