MathPlus's definitions
If a radian is defined as the angle formed by an arc length of a circle subtended at the center that is equal to its radius, then there are 2π radians, or 2π radii, that fit around the circumference of the circle. In other words, 360° equals 2π radians, or one radian is 180°/π, which is about 57.3°.
by MathPlus January 21, 2021
Get the 2πmug. What math authors want to tell their local and foreign publishers in Singapore to cease using their content sans their permission in their sample chapters they submit to tender local and foreign projects; to pay them their due royalty when they sell their copyrights at book fairs; and not to rob them, by unscrupulously replacing their names with foreign ones when their textbooks are tailor-made for developing markets.
Singapore will continue to be a first-class economy with a third-class educational publishing industry as long as its unethical publishers pay lip service to stop the steal, with a number of morally corrupt and inept people occupying key positions still around today.
by MathPlus December 8, 2020
Get the Stop the Stealmug. The number of avoidable corona infections and deaths, and the number of jobs lost, businesses destroyed, and futures compromised or shattered due to the ineptitude of Donald J. Trump, whose selfish actions and inactions make him the worst US president or head of state in modern history.
Trump toll shows that good governance, not developed public infrastructure, is the variable that determines the success or failure for a country in containing the coronavirus crisis.
by MathPlus February 16, 2021
Get the Trump Tollmug. When someone is at home with the oft-counterintuitive properties or numerical idiosyncrasies of the number zero—for example, although zero is neither positive nor negative, it behaves like an “even number.”
To appreciate the power and beauty of Calculus, one must be able to understand zero and to learn to live with it, because if zero is let loose, one can only expect chaos from the numerical troublemaker—one needs to be versed in zeromeracy to tame the “infidel number.”
by MathPlus January 6, 2019
Get the Zeromeracymug. When the methodology and pedagogy used in Singapore math textbooks and supplementary titles (foreign and local editions) at the same grade are believed or perceived to be equivalent, yet the level of difficulty of the brain-unfriendly questions in both editions differs significantly—the tailor-made overseas editions are often one or two grades lower than the local one.
US math educators need to take note of the same-same-but-different Singapore math titles to temper their expectations of their students’ mathematical proficiency compared to that of their Singaporean counterparts.
by MathPlus August 30, 2021
Get the Same-Same-But-Different Singapore Mathmug. Someone who tries to get vaccinated a multiple times the recommended number of jabs, because these extra shots had apparently helped them “stay healthy” with quasi-zero adverse effects, while at the same time relieving them of acute or chronic pain, or getting rid of other health conditions.
Mr. Mandal, who claimed to have been jolly-jabbed at least 11 times of the Covid-19 vaccine, was barred from receiving his 12th shot, after the authorities horrifyingly found out about his serial deceits.
by MathPlus January 7, 2022
Get the Jolly-Jabbedmug. A label for a pro-Trump white racist and supremacist turned terrorist—named after Donald J. Trump’s radicalized diehard supporters who staged a coup at the Capitol hoping to extend his stay at the White House.
by MathPlus February 23, 2021
Get the Trumporistmug.