X1 10M/C (Camb)

$$\frac{1}{9}\tan^{-1}9x$$  

$$\frac{1}{3}\tan^{-1}3x$$  

$$\frac{1}{9}\tan^{-1}\frac{x}{9}$$  

$$\frac{1}{3}\tan^{-1}\frac{x}{3}$$  

$$\sqrt[]{2}\cos\left(x+\frac{\pi}{4}\right)$$  

$$\sqrt[]{2}\cos\left(x-\frac{\pi}{4}\right)$$  

$$2\cos\left(x+\frac{\pi}{3}\right)$$  

$$2\cos\left(x-\frac{\pi}{3}\right)$$  

$$1-2\cos^28x$$  

$$1-2\cos^22x$$  

$$2\cos^28x-1$$  

$$2\cos^22x-1$$  

$$\frac{dy}{dx}=2x+y$$  

$$\frac{dy}{dx}=2x-y$$  

$$\frac{dy}{dx}=2xy$$  

$$\frac{dy}{dx}=\frac{2x}{y}$$  

$$\int\frac{1}{3\ \sqrt[]{1-u^2}}du$$  

$$\int\frac{3}{\sqrt[]{1-u^2}}du$$  

$$\int\frac{1}{3\ \sqrt[]{1-u^3}}du$$  

$$\int\frac{3}{\sqrt[]{1-u^3}}du$$  

$$\frac{1}{7776}$$  

$$\frac{5}{3888}$$  

$$\frac{125}{3888}$$  

$$\frac{625}{3888}$$  

$$P=C-\frac{1}{2}\cos2t$$   for some constant C

$$P=C+\frac{1}{2}\cos2t$$   for some constant C

$$P=C-\frac{1}{2}\sin2t$$   for some constant C

$$P=C+\frac{1}{2}\sin2t$$   for some constant C

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