Challenge Level

Which is larger cos(sin x) or sin(cos x) ? Does this depend on x ?

Challenge Level

Draw graphs of the sine and modulus functions and explain the humps.

Challenge Level

Can you find a way to prove the trig identities using a diagram?

Challenge Level

Which of these triangular jigsaws are impossible to finish?

Challenge Level

Can you find the area of the central part of this shape? Can you do it in more than one way?

Challenge Level

Can you work out the equations of the trig graphs I used to make my pattern?

Challenge Level

In this short challenge, can you use angle properties in a circle to figure out some trig identities?

Challenge Level

Trigonometry, circles and triangles combine in this short challenge.

Challenge Level

What happens when you straighten out concentric circles?

Challenge Level

If I tell you two sides of a right-angled triangle, you can easily work out the third. But what if the angle between the two sides is not a right angle?

Challenge Level

Can you justify this equation involving three angles?