# Monthly Archives: November 2017

## Rock, Paper, Triggers

I played a quick, but fun and mathematically rich game in precalculus the other day that I thought I’d share. Let’s call it **Rock, Paper, Triggers **for now, (it’s kinda like Rock, Paper, Scissors but with Trig functions) but if you have a better name, let me know.

Each person secretly picks a trig function (SINE, COSINE or TANGENT) for themselves, and an angle to send to the other person. Then, once ready, both reveal and each person thinks about…

**TheirFunctionOf(**theAngleSentToThem**)**

Whoever’s value is higher wins. No need for exact values, just figure out which one is bigger (and DNE automatically loses). So for example:

PERSON 1:

sin()

269°

PERSON 2:

cos()

190°

Person 1 has sin(190°) and person 2 has cos(269°). Well, both are negative, but 269° is so close to 270° that cos(269°) is a little less negative. So person 2 wins!

This was really good for number sense (no calculators), for thinking about what values of the different functions are possible, and where those values are on the unit circle.