Key Stage 3 (Junior Secondary) > 3.2 Measures, Shape & Space 度量、圖形與空間 > Trigonometric Ratios and Using Trigonometry 三角比和三角的應用 >
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Key Stage 3 (Junior Secondary) > 3.2 Measures, Shape & Space 度量、圖形與空間 > Trigonometric Ratios and Using Trigonometry 三角比和三角的應用 >
Introduction to Cosine & Tangent |