I Have, Who Has – Trig Identities


The I Have, Who Has… technique is posted on David Pleacher‘s site. Students are handed cards with a question and an answer. For example, the exercise would start with the teacher asking something like, “who has (sin x)/(cos x)?” The student with a tan x answer would reply, “I have tan x” and then read his question, which might be “Who has 1?” A student with an identity equivalent to 1 would reply and the game would continue.

You can get David’s set of cards for this activity here.




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