20. Trigonometry

20.01 Trigonometric ratios

20.02 Angles of elevation and depression (Extended)

20.04 Sine rule (Extended)

20.05 Cosine rule (Extended)

20.06 Area rule (Extended)

20.07 Applications (Extended)

20.08 Trigonometry in 3D (Extended)

20.09 Distance from a point to a line (Extended)

20.10 Exact values (Extended)

iGCSE (2021 Edition)

20.07 Applications (Extended)

Worksheet

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Outcomes

0580E6.4A

Solve problems using the sine rule for any triangle.

0580E6.4B

Solve problems using the cosine rule for any triangle.

0580E6.4C

Solve problems using the formula area of triangle = 12 ab sin C.

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