然後將條或汁到咁上下再逐個試?? 原帖由 Klu3kY 於 15/4/2008 22:32 發表 http://www1.nakuz.com/bbs/images/common/back.gif
計48果D數係咪唔可以約簡同埋將tan轉sin果d,
然後將條或汁到咁上下再逐個試??
點解要逐個試?? 原帖由 piyopiyo 於 14-4-2008 21:54 發表 http://www.nakuz.com/bbs/images/common/back.gif
3. tanx = 2sinx
tanx - 2sinx = 0
sinx(1/cosx- 2) =0
接著自行了斷
引用2樓精彩既內容先...
sinx = 0 , cosx = 0.5
x = 0,180,360 x = 60,300
原帖由 L.K. 於 15-4-2008 22:55 發表 http://www.nakuz.com/bbs/images/common/back.gif
點解要逐個試??
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