Making Waveslive
Age 16 to 18
Challenge Level
Which is larger cos(sin x) or sin(cos x) ? Does this depend on x ?
Loch Nesslive
Age 16 to 18
Challenge Level
Draw graphs of the sine and modulus functions and explain the humps.
T for Tanlive
Age 16 to 18
Challenge Level
Can you find a way to prove the trig identities using a diagram?
Impossible Triangles?
Age 16 to 18
Challenge Level
Which of these triangular jigsaws are impossible to finish?
Curved Square
Age 16 to 18
Challenge Level
Can you find the area of the central part of this shape? Can you do it in more than one way?
Tangled Trig Graphs
Age 16 to 18
Challenge Level
Can you work out the equations of the trig graphs I used to make my pattern?
Trig Identitylive
Age 16 to 18
Challenge Level
In this short challenge, can you use angle properties in a circle to figure out some trig identities?
Geometric Trig
Age 16 to 18 Short
Challenge Level
Trigonometry, circles and triangles combine in this short challenge.
Stand up Arcs
Age 16 to 18 Short
Challenge Level
What happens when you straighten out concentric circles?
Calculating with Cosineslive
Age 14 to 18
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?
Tri-angled Triglive
Age 16 to 18
Challenge Level
Can you justify this equation involving three angles?
NRICH is part of the family of activities in the Millennium Mathematics Project.