A collection of frequent topic requests. I research and take notes, looking for Aha! moments. Feel free to browse or join the discussion.
in the trigonometry article i couldn't find anything about the relation of sin^2θ+cos^2θ＝１i missed it? if not would be nice to be part of trig part2.
Thanks, that one comes from the Pythagorean Theorem (mentioned briefly in the article). There's a diagram here: http://betterexplained.com/wp-content/uploads/trig/trig-identities.png which might help. I'd like to do a trig part 2 with the other identities as well.