2/5Standard angles
COMING SOON · TOPIC 2 OF 5Standard anglesThe other angle, the 45° and 30°–60° set squares, the turning stick, tan near 90° and the table.This topic video is in production. Lesson 3 of 171: Trigonometry for physics.The full course opens in January 2027.
Lesson 003: its 5 topics
- 1Sides and the three ratiosNaming the sides, sin, cos and tan, only the angle matters, Pythagoras inside the triangleTopic 1 of 5Coming soon
- 2Standard anglesThe other angle, the 45° and 30°–60° set squares, the turning stick, tan near 90° and the tableTopic 2 of 5Coming soon
- 3Using the ratiosChoosing the ratio from the two sides you know: the flagpole’s shadow, the kiteTopic 3 of 5Coming soon
- 4The radianArc over radius, degrees to radians and back, the degrees trapTopic 4 of 5Coming soon
- 5Small anglessin θ ≈ θ, tan θ ≈ θ, cos θ ≈ 1; how small is small; where physics uses itTopic 5 of 5Coming soon