Class 10 · Chapter 9 · Trigonometry

Some Applications of Trigonometry

Heights and distances: finding the right triangle hidden in a real scene.

Source: NCERT Mathematics, Class 10

1. 9.1The Angle of ElevationAttention · Look at the horizontal line through the eye: the angle starts there.6 min
2. 9.2Choosing the Right RatioAttention · Look at which two sides the problem connects, then pick the ratio.10 min
3. 9.3The Angle of DepressionAttention · Look at the horizontal line at the top, not the cliff.8 min
4. 9.4Two Observations, One HeightAttention · Look at what the two triangles share: the height.12 min