Jonathan Pek's answer to Charles's Secondary 4 A Maths Singapore question.
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Remember the 4 qudrants.
More Info: https://revisionmaths.com/advanced-level-maths-revision/pure-maths/trigonometry/sin-cos-and-tan#:~:text=In%20the%20fourth%20quadrant%2C%20Cos,since%20it%20spells%20%22cast%22.&text=These%20angles%20are%20%22related%20angles,related%20in%20a%20similar%20way.
More Info: https://revisionmaths.com/advanced-level-maths-revision/pure-maths/trigonometry/sin-cos-and-tan#:~:text=In%20the%20fourth%20quadrant%2C%20Cos,since%20it%20spells%20%22cast%22.&text=These%20angles%20are%20%22related%20angles,related%20in%20a%20similar%20way.
Date Posted:
4 years ago
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