← Form 3 › Mathematics › Trigonometry in a right-angled triangle
🧩 Mathematics · Form 3 · Lesson 15

Trigonometric ratios for acute angles, Sine and cosine of complementary angles

In a right-angled triangle: sin = opposite/hypotenuse, cos = adjacent/hypotenuse, tan = opposite/adjacent.

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Short cards. Read them, then check your understanding below.

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