The Haryana Board of School Education (HBSE) has made the Maths course materials for Class 10 available online for the ...

Part of that is the way it's taught. Students are taught the "unit circle" and its relationship to trigonometry, but many fail to make the leap on how crucial circles are for trig functions.

A square and a rectangle, a circle and a triangle. GIRL 2: Triangles are pointy things, they are all around us. Images of the shapes appear as they are mentioned in the song.