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Some useful formulas
Cosine function
Some properties of the cosine function (cos) :
Sine function
Some properties of the sine function (sin) :
Tangent function
Some properties of the tangent function (tan) :
If you have any comments or questions about the trigonometry formulas, you can discuss them in the forum: Discussion forums.
CHALLENGE : If you want to practice demonstrating any of these formulas, you can propose a proof in the forum: Discussion forums.
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