記事一覧
May 2, 2024: Studying Maths (48), Exponential（数学の勉強（48）、指数）
For the last ten days, I have been working on exponentials again. I was sure I had to do so because I still had not fully understood this part. I also knew that without acquiring it, I would not be ab
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April 26, 2024: Studying Maths (47), Exponential and Logarithm-4（数学の勉強（47）、指数と対数-4）
I have just completed the last round of the exponential and logarithm sections. It was hard to understand. And I struggled hard to solve the questions. I was happy to finish this section and move on t
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April 17, 2024:Studying Maths (46), Exponential and Logarithm-3 （数学の勉強（46）、指数と対数3）
I have just completed the third round of the exponential and logarithm sections. In this round, I worked on the natural log. It was hard to understand, and it took me a lot of time to understand the s
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April 12, 20224: Studying Maths (45), Exponential and Logarithm-2 （数学の勉強（45）、指数と対数-2）
I have just completed the second round of the exponential and logarithm sections. Like the first round, it was not as hard to understand as expected. But I doubt if I have really understood the first
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April 5, 2024: Studying Maths (44), Exponential and Logarithm-1 （数学の勉強（44）、指数と対数-1）
I have worked on the first round of the exponential and logarithm sections. This section, one of the longest sections in this book, consists of eight sub-sections. The first round was not as hard to u
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March 28, 2024: Studying Maths (43), Trigonometry-4 （数学の勉強（43）、三角関数-4）
I have just finished the last round of trigonometry in maths. I am very happy to have completed it. I seem to have grown a little bit better than when I was at school. At school, I could not understan
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March 18, 2024: Studying Maths (42), Trigonometry-3, 数学の勉強（42）、三角関数-3）
I have just finished the third round of trigonometry in maths. I enjoyed it as much as I did in the second round. The next round is the last part of this section.
三角関数の３回目を終えました。 2回目と同じくらい楽しめました。次回は
March 11, 2024:Studying Maths (41), Trigonometry-2, 数学の勉強（41）、三角関数-2）
I worked on trigonometry in maths. It was the second time. Surprisingly, it was good fun. The questions were less hard than I expected. I did not have to struggle with them. But I still have two more
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March 4, 2024: Studying Maths (40), Trigonometry, Imagination（数学の勉強（40）、三角関数、想像力）
I have studied the first part of trigonometry on my own. It was very difficult, as I expected. I hit the wall right from the start. I was unable to understand what was in the textbook well. I needed a
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February 23, 2024:Studying Maths (39), Coordinate Geometry （数学の勉強（39）、図形と方程式）
Here is the last part of the questions in the Coordinate Geometry section. It was great fun to solve these questions. This section came to an end with these questions. From now on, I will work on trig
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February 13, 2024:Studying Maths (38), Coordinate Geometry （数学の勉強（38）、図形と方程式）
For about ten days, I have been working on coordinate geometry in maths. At first glance, it looked very complicated and hard to understand. But in fact, it is easy to follow and very enjoyable. I am
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三角比・三角関数の公式を単位円と関連づけて理解する
高校数学のなかで、いちばん多くの公式が登場するのが三角関数の単元かもしれません。確かに、式にすると数が多くなってしまいますが、実は単位円を用いることで公式として覚えるよりもずっと楽に、しかも公式を覚えるよりもずっと深く理解することができます。
cos θ の意味まず、次の図のような状態を考えましょう。
単位円があります。そこに、x 軸の正の向きから θ だけ傾いた、長さが 1 の棒がありま
February 7, 2024: Studying Maths (37), Proportions （数学の勉強（37）、比率））
I have just finished doing the proportion part of the maths. It was easy to understand and the questions were not too difficult. Next is the last part of algebra and functions, which is the binomial e
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