Before they can use sin, cos and tan, pupils need to be able to label the sides of a right-angled triangle. The longest side, the one opposite the right angle, is called the hypotenuse. What you call ...

I’ve been walking around for the past several weeks randomly practising the Triangle pose. I stop wherever I am, take a wide and strong stance, extend to one side, turn and look up. What I see is ...

Using a unit circle can help develop a deeper understanding of trigonometry in right-angled triangles. In this maths lesson, students explore the behaviour of a radius vector as it rotates around a ...

IN this school-book of three hundred and twenty-six pages the authors have arranged a course on trigonometry which should be most useful to those studying this subject for the first time. The book may ...