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education/math/MATH1060 (trig)/Graphing.md
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@ -150,4 +150,5 @@ Vertical shift: $1$
> Evaluate $\arccos{\frac{1}{2}}$ using the unit circle. > Evaluate $\arccos{\frac{1}{2}}$ using the unit circle.
Taking the inverse of the above function, we get this. Because the domain of $cos$ ranges from $0$ to $\pi$ inclusive, the answer is going to be in quadrant 1 or quadrant 2. Taking the inverse of the above function, we get this. Because the domain of $cos$ ranges from $0$ to $\pi$ inclusive, the answer is going to be in quadrant 1 or quadrant 2.
$$ cos(x) = \frac{1}{2} $$ $$ cos(a) = \frac{1}{2} $$
When $x$ is equal to one half, the angle is equal to $\frac{\pi}{3}$.