I've wondered if maybe we'd be better of NOT teaching sin/cos immediately, and instead giving children Euler's identity first
Sadly, I've got to say, I never use Euler's, always the trig functions to solve real problems (I'm an electrical engineer.)
I've got a 3yrs old and a 2 years old and would love to see them have a better time with and a deeper understanding of math than I did.
Math was (and sometimes still is) a real pain for me, and I've never really understood why, becuase the rules are all very simple.
What I really don't understand is if you're running a a database company, do you really want to trumpet how lousy your internal security is in federal court?
If Microsoft was allowed to make as much money as it should under a properly operating closed source software ecosystem, people from Seattle wouldn't need to sell overpriced coffee to get rich!
I judge a religion as being good or bad based on whether its adherents become better people as a result of practicing it. - Joe Mullally, computer salesman