Asked by Sam

How's the rule go on evaluating compositions of functions? Is it that sine is positive in first and second quadrants, while cos/tan are positive in the first and the fourth?

Answers

Answered by MathMate
"Is it that sine is positive in first and second quadrants, while cos/tan are positive in the first and the fourth? "
The answer is yes whether it is related to the evaluation of composition of functions or not.
Can you post an example to clarify the context of the first question?
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