Resources tagged with: Trigonometric identities

There are 2 NRICH Mathematical resources connected to Trigonometric identities, you may find related items under Pythagoras and Trigonometry.

Broad Topics > Pythagoras and Trigonometry > Trigonometric identities

Round and Round a Circle

Age 14 to 16 Challenge Level:

Can you explain what is happening and account for the values being displayed?

Sine and Cosine for Connected Angles

Age 14 to 16 Challenge Level:

The length AM can be calculated using trigonometry in two different ways. Create this pair of equivalent calculations for different peg boards, notice a general result, and account for it.