Chang's Math blog

Compilation of math questions by pupils

Sunday, June 22, 2025

Law of Sines

The law of sines #trigonometry
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      • Pentagon Pattern
      • Diagonals are expressed as surds!
      • Law of Sines
      • Graphical proof of trigo identity
      • Important to have enough sleep before an exam
      • Appreciating equations involving circles
      • Irrational numbers — pi, e, golden ratio
      • …Same as circumference of the Big circle!
      • What is the Math behind this beautiful animation?—...
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