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【Python】回転行列【AtCoder】

Last updated at Posted at 2021-03-28

ABC197
D - Opposite
ででてきた、回転行列問題

今後のためにも自作ライブラリの作成。

※ちなみにこの問題は複素数平面でもとける!
知らなくても競プロで困ることはなさそうだが、教養として知っておいて良さそう。
俺の学生時代は教科書にのっていなかったけど、今や数Ⅲの範囲らしい・・・
ヨビノリたくみさんのyoutubeが参考になった。
中学数学からはじめる複素数

#回転行列

test.py
import math
def RotationMatrix(before_x,before_y,d):
    d = math.radians(d)
    new_x = before_x*math.cos(d)-before_y*math.sin(d)
    new_y = before_x*math.sin(d)+before_y*math.cos(d)
    return new_x,new_y

おわり!

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