Related Posts

• Chart math 1 part15 [shape and weighing]   Toshikazu Sunada (Written by) Zuken Publishing Co., Ltd. (Publishing House) 2003April 1, 2016 (Release date) Hardcover (Format) I'll figure it out today.。 It's from question 48.。 ヒントにあるように\(\sin { \theta } =\tan { \theta } \cos { \theta } \)When you notice、\(f\left( \theta \right) \)can be transformed into the shape of a product、Take advantage of this。 (1)You just have to solve it normally.。 (2)は\(f\left( \theta \right)<0 \)So、積の2つの項が\(0\)is the larger and smaller。 あとは\(0°<\theta <180°\)（ただし\(\theta \neq 90°\)When、\(\tan { \theta } <1\)となるのは\(0°<\theta <45°\)、\(90°<\theta <180°\)It's a good idea to pay attention to。 I accidentally made a mistake.。 You have to be careful.。 Next is Question 49.。 これは $$\sin ^{ 2 }{ x } +\cos ^{ 2 }{ x } =1$$ $$\sin ^{ 2 }{ y } +\cos ^{ 2 }{ y } =1$$ という公式を使うと、Because four variables and four expressions, the equation can be solved if it is connected.。 I solved it using the formula of the synthesis of the triangle function like the following.。 $$a\sin { \theta } +b\cos { \theta } =\sqrt { { a }^{ 2 }+{ B }^{ 2 } } \sin { \left( \theta +\alpha…
• Chart math 1 part13 [shape and weighing] Toshikazu Sunada (Written by) Zuken Publishing Co., Ltd. (Publishing House) 2003April 1, 2016 (Release date) Hardcover (Format) 第3章「図形と計量」に進んだ。 総合演習をAから解いていこう。 三角比とかが出題されるみたいだな。 まずは問38。 僕はいろいろな公式を使って式を変形して解いた。 以下のようなものだ。 $$\sin ^{ 2 }{ \alpha =\frac { 1-\cos { 2\alpha } }{ 2 } } $$ $$\cos ^{ 2 }{ \alpha =\frac { 1+\cos { 2\alpha } }{ 2 } } $$ $$\sin { \left( 90°-\alpha \right) } =\cos { \alpha } $$ $$\cos { \left( 90°-\alpha \right) } =\sin { \alpha } $$ But、今\(\alpha =22.5°\)なので\(3\alpha =90°-\alpha \)、\(5\alpha =180°-3\alpha \)、\(7\alpha =180°-\alpha \)であることに注目すれば、式が\(\sin { \alpha } \)、\(\cos { \alpha } \)のみで表されて、もっと簡単になったみたいだ。 次は問39。 以下の公式を用いて、変形していけば簡単に解ける。 $$\sin ^{ 2 }{ \theta + } \cos ^{ 2 }{ \theta =1…
• Deep Learning from scratch: Thetheory and implementation of deep learning in Python Yasuya Saito (Written by) O'Reilly (Publishing House) 2016September 24, 2010 (Release date) Hardcover (Format) Artificial Intelligence Technology of the Topic Now、A book about deep learning。 I've had one book before.、I bought a book about machine learning.、I don't know.、I stopped reading on the way.。 At that time.、I bought this book which was released recently because it is very high evaluation on Amazon.。 僕が買ったのはもう第4刷だったのでかなり売れてるってことなのかな？ それで内容は、Starting with Perceptron、Learn about neural networks、The error reverse propagation method came out.、Learn how to set various parameters、Learning about convolvol folding neural networks。 It seems that deep learning has increased the layer of convolvollited neural networks (CNN).。 CNN is particularly effective in image recognition。 The programming language uses Python.、I thought that it was very easy to calculate the matrix in Python.。 As highly regarded as the previous reputation、It was very easy to understand.。 ディープラーニングについて理解できた気がする… 人工知能って興味はあるけど難しいのかなと思っていたが、What is written in this book was easy to read.。 The author is only about 32 years old.、It's amazing to be able to write such an easy-to-understand book.。 This book is written about image recognition.、I was also interested in natural language.。 So、I thought I'd read another book one of these days.。