Sine, Cosine and Tangent are the main functions used in Trigonometry and are based on a Right-Angled Triangle.
- Right-Angled Triangle
A right-angled triangle (also called a right triangle) is a triangle with a right angle (90°) in it.
- A name to each side of a right triangle
- Sine, Cosine and Tangent
- cos 0°, sin 0°, tan 0° or θ=0°
Here we have a right-angled triangle. The standard is the angle A. Let's imagine keeping the angle C at right angles and reducing the angle A infinitely close to zero degrees.
If we reduce the angle A to infinity, the hypotenuse and the adjacent of a right-angled triangle will be completely attached. Then, the opposite will be almost zero, and the hypotenuse and the adjacent will be almost the same.
Therefore,
- cos 90°, sin 90°, tan 90° or θ=90°
The hypotenuse increases infinitely and the opposite increases infinitely if the angle A is made close to 90 degrees. In other words, the opposite and hypotenuse increase to approximately the same level.
Therefore,
https://m.blog.naver.com/computingfarmer/222633797480
https://youtube.com/shorts/aTEyA82u52k?si=WcFyGPaZ6j6FdHO1
https://m.blog.naver.com/limchung90/221791718026
https://www.youtube.com/watch?v=VMrT1wwXxY0&list=PLBPUzs26iQhpxyBcHSs-dI9pW19jaslcq&index=7
'Math' 카테고리의 다른 글
| Least Square Method(Least Mean Square) (0) | 2024.03.08 |
|---|---|
| Differential, Differentiation, Derivative (0) | 2023.12.12 |
| variance, Standard deviation, Covariance, Correlation Coefficient (0) | 2023.06.14 |
| Logarithmic(log), Exponential(exp) (0) | 2023.05.26 |
| Negative Exponent (0) | 2021.06.18 |