Trigonometry Angles--Pi/2 -- from Wolfram MathWorld
What is pi over 2 in degrees? - Quora
![Why are the x-values [-pi/2, pi/2] here? I thought pi/2 meant 90 degrees on a unit circle. I'm confused. : r/calculus](https://preview.redd.it/why-are-the-x-values-pi-2-pi-2-here-i-thought-pi-2-meant-90-v0-5ndduwasnjfa1.jpg?width=1080&crop=smart&auto=webp&s=412bccff8ac09523d4e7de52017014baf946b46d "Why are the x-values [-pi/2, pi/2] here? I thought pi/2 meant 90 degrees on a unit circle. I'm confused. : r/calculus")
Why are the x-values [-pi/2, pi/2] here? I thought pi/2 meant 90 degrees on a unit circle. I'm confused. : r/calculus
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Cos pi/2 - Find Value of Cos pi/2 | Cos π/2
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Why is pi/6 less than pi/2? How do I properly create a scale for a graph using the unit circle (in radians)? | Homework.Study.com
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Success Tutorials Math Notes: Rob Lomas, MathIsSoEasy.com
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