# Edexcel A Level

## Solving Trig Equations

##### Find Derived Identity 1
Two other identities can be derived from the identity ${\sin ^2}(x) + {\cos ^2}(x) \equiv 1$. This display allows you to view one of them.

Adjust the sliders so the green and red curves coincide. You will see the identity.
##### Find Derived Identity 2
Two other identities can be derived from the identity ${\sin ^2}(x) + {\cos ^2}(x) \equiv 1$. This display allows you to view one of them.

Adjust the sliders so the green and red curves coincide. You will see the identity.