Angles – The seed of Trigonometry
Angle in degrees or radians? Which one to choose?
Why do we express angles in terms of fractions or multiples of π i.e. 30°, 90°, 180°, 360°… as π/6, π/2, π, 2π … ?
Why does a circle have 360°? Why is 360° = 2π?
What is behind the periodicity of trigonometric functions?
For answers, read on…
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