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Precalc question - how does it go from 5pi/2 to just pi/2?? Sophomore math for my son and I don't understand : r/askmath
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Using the unit circle, how do you find the value of the trigonometric function: sec -(pi/2)? | Socratic
![trigonometry - Why is $\sin\left(\frac{5\pi}{2}\right) = 1$ and not $5$? - Mathematics Stack Exchange trigonometry - Why is $\sin\left(\frac{5\pi}{2}\right) = 1$ and not $5$? - Mathematics Stack Exchange](https://i.stack.imgur.com/adyUD.png)
trigonometry - Why is $\sin\left(\frac{5\pi}{2}\right) = 1$ and not $5$? - Mathematics Stack Exchange
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