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三角函數基本練習,針對0、30、45、60、90,進一步到第二、第三、第四象限角,再進階到弧度量,360度以外的同界角。
Trigonometric basic exercises for 0,30,45,60,90, and further to the second, third, and fourth quadrant angle, and then advanced to the radian amount, the angle of 360 degrees away from the same sector.
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2012/10/4
2012/10/22