How can I tell if each of these functions are even or odd? $\displaystyle f(x) = \sin{x}$ $\displaystyle f(x) = \cos{x}$ $\displaystyle f(x) = \tan{x}$ $\displaystyle f(x) = \sec{x}$
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Originally Posted by live_laugh_luv27 How can I tell if each of these functions are even or odd? $\displaystyle f(x) = \sin{x}~\color{blue}\text{odd}$ $\displaystyle f(x) = \cos{x}~\color{blue}\text{even}$ $\displaystyle f(x) = \tan{x}~\color{blue}\text{odd}$ $\displaystyle f(x) = \sec{x}~\color{blue}\text{even}$ You may just have to know these. We can graph each. If the graph is symmetric about the y-axis, the function is even. If the graph is symmetric about the origin, the function is odd.
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