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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 [...]