Mathematical Methods Β· Unit 4 Β· Trigonometry Β· Cosine and sine rules
Use the cosine rule, π2 = π2 + π2 β 2ππ cos(πΆ).
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Model and solve problems that involve the sine rule, cosine rule and the area formula in two - and three-dimensional contexts (including bearings, directions and angles of elevation and depression), with and without technology. Mathematical Methods 2025 v1.3
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Use the formula area = 1 2 π π sin (π΄) to calculate the area of a triangle.