Proofs Using The "Other Two" Pythagorean Identities: tan2X+1 = sec2X & 1+cot2X = csc2X
These two identities show up all the time in trig proofs, but they're really easy to get mixed up (wait, does tan go with sec or csc?). So, in this video I show you a great trick to memorize them so you can write them down at the top of your quiz or test (a practice I highly recommend). I also show you how to spot trig proof problems where they'll come in handy, and work a few examples.
If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)