Satoshi HigashinoI just started RED(小红书), the Chinese version of InstagramYou have to use a VPN to use Instagram from China.Sep 8, 2022Sep 8, 2022
Satoshi HigashinoThe Double and Triple Angle Formulas Derivation by de Moivre’s TheoremAnd Half Angle Formulas as a Bonus at The EndJan 22, 20225Jan 22, 20225
Satoshi HigashinoWhy Is There Only One Type of 3x3 Magic Square?A magic square is a square array of positive integers such that the sums of the numbers in each row, each column, and both main diagonals…Jan 15, 2022Jan 15, 2022
Satoshi HigashinoSimple Proof That Equilateral Triangle Has the Maximum Area Among All Triangles Inscribed in a…What is the largest area of a triangle with perimeter length L?Jan 8, 20221Jan 8, 20221
Satoshi HigashinoIntuitive Understanding of the Law of CosinesThe law of cosines (also known as the cosine formula) statesJan 1, 2022Jan 1, 2022
Satoshi HigashinoWhat Is the Definition of One Second?The formal definition of one second in the International System of Units (SI) is as follows:Dec 25, 2021Dec 25, 2021
Satoshi HigashinoWhat Percentage Is the “Tip of the Iceberg”?Suppose an iceberg is floating in the ocean.Dec 18, 2021Dec 18, 2021
Satoshi HigashinoWhy Don’t Clouds Fall Out of the Sky?Clouds are a collection of tiny water droplets floating in the atmosphere. The diameter of these water droplets is about 3 to 10 μm (1 μm =…Dec 11, 2021Dec 11, 2021
Satoshi HigashinoLaser Cooling Explained: The Nobel Prize-Winning Method• What is laser cooling? [Overview]: It is a method of using a laser to lower the temperature of a gas to near absolute zero. See below…Dec 4, 2021Dec 4, 2021
Satoshi HigashinoVisual Proof of Inequality of Arithmetic and Geometric Means (AM–GM Inequality): (a + b)/2 ≥ √abThe inequality of arithmetic and geometric means, or the AM–GM inequality, is one of the most famous expressions in mathematics.Nov 27, 20211Nov 27, 20211