Duelling Mathematicians

About this topic

Practise Trig Identities, including \cos(180^\circ-x)=\, \cos(360^\circ-x)=\, \operatorname{sec}x=\ and \frac{\cos(x)}{\sin(x)}=\.

This topic covers

• \cos(180^\circ-x)=\
• \cos(360^\circ-x)=\
• \operatorname{sec}x=\
• \frac{\cos(x)}{\sin(x)}=\

Example question types

• answer a short question such as “\cos(-x)=\ ”
• answer a short question such as “\cos(180^\circ-x)=\ ”
• answer a short question such as “\cos(2x)=\ ”