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x2−2x−14=0x^2-2x-14=0x2−2x−14=0
limx→∞(ex24−x3)\lim_{x\to\infty}\left(\frac{e^{x^2}}{4-x^3}\right)x→∞lim(4−x3ex2)
y=1xsin(x)y=\frac{1}{x}sin\left(x\right)y=x1sin(x)
−4732+−3269-4732+-3269−4732+−3269
sin(x)1−cos(x)−1sin(x)=tan(x)\frac{\sin\left(x\right)}{1-\cos\left(x\right)}-\frac{1}{\sin\left(x\right)}=\tan\left(x\right)1−cos(x)sin(x)−sin(x)1=tan(x)
sec2a+tan2a+1=2cos2a\sec^2a+tan^2a+1=\frac{2}{cos^2a}sec2a+tan2a+1=cos2a2
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