深入探討三角代數式的最大/最小值

[@waichingtsang1468]

Why don't we consider the range of sin and cos function , then using what we have learnt such as addition ,subtraction, etc to find the range of the required function? I think that is the safest method for finding maximum and minimum values of trigonometric functions.

[@lisoping519]

True

[@garysuen3796]

時代唔同左…明明要學既野唔講唔教，再教又唔係人人明。辛苦你啦霍sir subsidiary angle 又唔講得complex numbers又講唔到

[@mathseasy]

最過份是連 absolute value 及 radian 都唔教。

[@garysuen3796]

學校沒有教的數學 霍sir 教左呢兩個topic 就要學埋2次不等式 唔學既話，學limit 就會變學到變舊💩😂

[@garysuen3796]

學校沒有教的數學 霍sir ,睇完你條片無耐就遇到t formulae😂我真係好彩

[@pakfan1130]

請問用邊個程式可以畫片中的圖？

[@mathseasy]

Geogebra