Selected: Edexcel A Level Maths - Pure Maths
AS & A2 (Whole Course) - All Questions - Casio fx-991EX
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AS & A2 (Whole Course) - All Questions - Casio fx-991EX
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Check solutions to equations numerically
Explore sin, cos and tan in the unit circle
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.
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.
Adjust the sliders so the green and red curves coincide. You will see the identity.
sin(x + a) + sin(x - a)
The display shows \(\color{blue}{y = \sin x}\) in blue and \(\color{red}{y = \sin \left( {x + a} \right) + \sin \left( {x - a} \right)}\)