# Math Blog

/Math Blog/

## Additional Math Video – 30 Seconds Revision of the 5 Coordinate Geometry Formulas

By |2020-06-04T16:01:11+08:00June 4th, 2020|A-Math - Coordinate Geometry, A-Math - Video|

I am creating my own Additional Math Videos as I cannot find suitable video that target students in Singapore Schools. [...]

## Additional Math – Differentiation – Sin 2x and 2 lnx

By |2020-02-24T22:10:53+08:00February 24th, 2020|A-Math - Differentiation|

Use Quotient Rule $latex \displaystyle \frac{{dy}}{{dx}}=\frac{{v\frac{{du}}{{dx}}-u\frac{{dv}}{{dx}}}}{{{{v}^{2}}}}$ Differentiate the variables separately before inserting into the rule, there is less chance of [...]

## Additional Math – Trigonometry – Prove Identities involving Cot A and TanA

By |2020-02-01T22:04:34+08:00February 1st, 2020|A-Math - Trigonometry|

$latex \displaystyle \ \frac{{\cot A-\tan A}}{{\cot A+\tan A}}$ $latex \displaystyle (\cot A-\tan A)\div (\cot A+\tan A)$ Change tan A  to [...]