Quote:
Originally Posted by Chris L T521  Adding/Changing something to this:
A mnemonic that is sometimes used for the signs is:
All - All six (sin, cos, tan, sec, csc, and cot) are positive in QI
Students - Only sin and csc is positive in QII
Take - Only tan and cot is positive in QIII
Calculus - Only cos and sec is positive in QIV |
Thanks. I'm not sure why I didn't mention the others, but being reciprocals, the mnemonic certainly holds for them as well.