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Is $\cot^{-1}(-\cot x)$ equal to $-x$?

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#trigonometry
1.3k
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$\arcsin(x) = \arctan(2x)$

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#trigonometry
128
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how to prove $f'(x) \leq \frac{f(x) - f(y)}{x - y} \leq f'(y) $

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#calculus #trigonometry #inequality
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Is the graph of the $\frac{1}{x^2}$ function a horizontal hyperbola?

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#algebra-precalculus #trigonometry #graphing-functions
277
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Deriving sine difference formula

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#trigonometry #proof-writing
731
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How to prove $AC^2 + BC^2 = 2 AB^2$, if $\cot A + \cot B = 2 \cot C$ in $\triangle ABC$?

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#geometry #trigonometry
673
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Main period of $f(x)=\cos 5x+\cos 10x$

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#trigonometry #periodic-functions
1.8k
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graphical representation of trig functions

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#trigonometry #triangles #circles
223
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Proving $\sum_{k=1}^n\vert\cos(k)\vert\ge \frac{n}{4}$ for all $n>0$

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#real-analysis #trigonometry #inequality
342
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Find integral of $\operatorname{sinc}(\pi x)$ over range $x=[0,1]$

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#integration #trigonometry #definite-integrals
239
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Finding coordinates of a point on a rolling circle

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#geometry #trigonometry
1.2k
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How to determine Euler angles of ZYZ rotations?

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#trigonometry #rotations #angle
254
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The minimum value of perimeter of the triangle

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#geometry #number-theory #elementary-number-theory #trigonometry #diophantine-equations
42
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Modify $\tan(x)$ function to output $\infty$ with each step equals $1$

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#trigonometry
124
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Relationship between 2 definitions of sin. One using differential equations and one using the unit circle.

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#ordinary-differential-equations #trigonometry

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