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Python 3, 55 bytes from math import*;print(int(sin(int(input())*pi/2)**2)) Why not do something slightly unconventional? Try it online!
#1: Initial revision
# [Python 3], 55 bytes
<!-- language-all: lang-python -->
from math import*;print(int(sin(int(input())*pi/2)**2))
Why not do something slightly unconventional?
[Try it online!][TIO-mnknfbba]
[Python 3]: https://docs.python.org/3/
[TIO-mnknfbba]: https://tio.run/##K6gsycjPM/7/P60oP1chN7EkQyEztyC/qETLuqAoM69EA4SLM/M0IOyC0hINTU2tgkx9I00tLSNNzf//TQA "Python 3 – Try It Online"
