We can celebrate Spring with Desmos.
With my Further Mathematicians recently, we were looking at Cardioids
a+bsinθ and a + bcosθ. When do you get a dimple? When do you get an inner loop?
The University of Georgia – Polar Equations Alex Szatkowski investigating a + bcosθ.
A little more exploring here I think! Through the above link, I chanced upon Jim Wilson’s resources for a Technology and Secondary School Mathematics course. The Polar Equations exploration is here.
It’s holiday time for schools – if you are still on the lookout for Easter resources, see Easter 2019. For some lovely problems, check the Easter Challenges from Perton School Maths Department.