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제목80th LS(231205) Double Angle Theorem (PDF 544)2023-12-06 13:17:07
작성자 Level 10

https://youtu.be/FIzcXfoOIRk 

이전81th LS(231209) Polar Graph (PDF 584) Level 102023-12-10
-80th LS(231205) Double Angle Theorem (PDF 544) Level 102023-12-06
다음79th LS(231125) Trigonometry Sine rule (PDF 505) Level 102023-11-26