problem
Trig countdown
Age
16 to 18
Challenge level
A game for one or more players in which you make a target value by building a trig expression
problem
Inspecting identities
Age
16 to 18
Challenge level
Using trig identities to help sketch graphs of functions
problem
Proving half-angle formulae
Age
16 to 18
Challenge level
Can you find a geometric proof of these half-angle trig identities?
problem
T for tan
Age
16 to 18
Challenge level
Can you find a geometric proof for some $\tan\theta$ trig identities?
list
Trigonometry
list