Trigonometry 1: Grade 10 Core Mathematics

Learning outcomes

By the end of the sub-strand, the learner should be able to:

1. determine the trigonometric ratios of acute angles from mathematical tables and calculators
2. relate sines and cosines of complementary angles
3. relate the sine, cosine and tangent of acute angles
4. determine trigonometric ratios of special angles: 30°, 45°, 60° and 90° using triangles
5. apply trigonometric ratios to angles of elevation and depression
6. reflect on the use of trigonometry in real-life situations

Lessons in Trigonometry 1

1. 1Reading Sines and Cosines from Mathematical TablesDetermine the trigonometric ratios of acute angles from mathematical tables and calculators
2. 2Finding Cosine and Tangent Values of Acute AnglesDetermine the trigonometric ratios of acute angles from mathematical tables and calculators
3. 3Determining Trigonometric Ratios from Tables and CalculatorsDetermine the trigonometric ratios of acute angles from mathematical tables and calculators
4. 4Connecting Sine and Cosine in Complementary AnglesRelate sines and cosines of complementary angles
5. 5Solving Trigonometric Equations with Complementary AnglesRelate sines and cosines of complementary angles
6. 6Relating Sine, Cosine, and TangentRelate the sine, cosine and tangent of acute angles
7. 7Trigonometric Ratios of Special Angles: 30° and 60°Determine trigonometric ratios of special angles: 30°, 45°, 60° and 90° using triangles
8. 8Trigonometric Ratios of Special Angles: 45° and 90°Determine trigonometric ratios of special angles: 30°, 45°, 60° and 90° using triangles
9. 9Application of Trigonometric Ratios to Angles of Elevation and DepressionApply trigonometric ratios to angles of elevation and depression
10. 10Applying Trigonometric Ratios to Angles of Elevation and DepressionApply trigonometric ratios to angles of elevation and depression
11. 11Reflecting on Real-Life Applications of TrigonometryReflect on the use of trigonometry in real-life situations