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Zero is an important and necessary concept in mathematics. However, there are still many questions about this unique number. So, what do you need to know about the number zero? Zero is...
Inequalities are used to compare values and to express ranges or estimates in the case of uncertainty. However, you might want to know whether an inequality has solutions and when it may fail...
Trigonometric functions are often used in math (including calculus), and they also have real-life applications (such as signal processing). However, it can be tricky to remember the signs of...
Math circles are growing in popularity, and there are math circles all over the world for students of every age level. There are even math circles for teachers! So, what is a math...
Even and odd functions have symmetry in their graphs (about the y-axis or the origin). However, we can also tell what type of function we will get by adding or multiplying two or more of them...
Ellipses are used often in mathematics, and they also describe orbits of celestial bodies in astronomy. An ellipse is one of the conic sections, and a circle is just a specific case of an...