Mathematics
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About

Math is Fun

Algebra

A little trick for square

Inequality and absolute values

Taylor Expansion & inequality

Geometry

3x pairs of triangles

Symmetry for 30$^\circ $ angle

Numbers

***Squares, squares

***Trick of 999 x 999

Why is 5 special

Permutation and combination

6A and 6B

Sample space of 3 cards

Probability

Coin and die

Cupcakes

Letters

Probability of probability

Trigonometry

Derivatives of inverse trig functions make sense

**Law of sine makes it easy

*** New formula for sine values of 9 special angles?

Range of sine function

Sum to product

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Top posts
View all questions and answers
All Questions Answers
Score Newest
question
7
Is this a circular proof of Pythagorean Theorem? If not, are there better ones? [duplicate]
Mar 8, 2021
answer
7
Where should a water pump be placed to minimize the length of the pipe?
Mar 23, 2021
question
6
Why is this the trick to calculate $m\, 9$s $\times n\, 9$s?
Mar 4, 2021
answer
4
Is $\cos(2\theta)=\frac{2e^{i\theta}+2e^{-i\theta}}2$ a correct application of Euler's Formula?
Apr 6, 2021
answer
4
Combinatorics Problem - Identical Balls
Apr 24, 2021
answer
4
What is $\lim\limits_{x \to \infty}\dfrac{\sqrt{x^2+1}}{x+1}$?
Apr 25, 2021
answer
4
The value of $\sin{(135^\circ-2\alpha)}\cdot\sin{(\alpha-45^\circ)+\cos^2{(75^\circ-\alpha)}}-2\sin{(\alpha-30^\circ)}$ when $\alpha=60^\circ$
May 22, 2021
answer
3
Represent $x_1=\frac{1-\sqrt{37}}{3}$ and $x_2=\frac{1+\sqrt{37}}{3}$ on a number line
Apr 4, 2021
answer
3
Proving that in a quadrilateral $ABCD$, where $P$ is the intersection of angle bisectors of $BAD$ and $ADC$, $|BP|=|CP|$
Mar 28, 2021
answer
3
Show that there is a simultaneously tangent line to both the curves $y = e^x$ and $y = \ln x$
Apr 2, 2021

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