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## Timothy Cho $(function() {$(".js-rank-badge").addSpinner().load("/users/rank?userId=398268"); });

Just a high schooler who has an interest in math

trying some equations

$$2.999999 \approxeq 3$$

$$\arctan 1=\frac{\pi} 4$$

$$\cos (\alpha +\beta)= \cos \alpha \cos \beta-\sin \alpha\sin\beta$$

$$\bigstar$$

$$\cot \frac{\pi}6 = \sqrt 3$$

$$\cosh 2 = \frac{e^2+e^{-2}}2$$

$$m=\frac{\Delta y}{\Delta x} = \frac{y_2-y_1}{x_2-x_1}$$

$$\Gamma(x) = \int_0^\infty t^{x-1}e^{-t}dt$$

$$\log_25= \frac{\ln 5}{\ln 2}$$

$$\lim_{x \to \infty} \bigl(1+\frac 1x\bigr)^x=e$$

$$\frac{\mathrm d}{\mathrm dx} [5x^3]= 15x^2 \Rightarrow (5x^3)'=15x^2$$

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