Intro to radians
If sin x = 1/2 and x is between pi/2 and 3pi/2, what is the value of x/2? (The answer key says it is 5pi/12, but I have no clue how to
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simplify-1-(pi)/2
![How do you evaluate cos^-1[cos(-pi/2)]? | Socratic](https://useruploads.socratic.org/Uy8LuL9zR2GDEo8cnUPq_30656204_1656126397756357_2131343757902086144_n.jpg "How do you evaluate cos^-1[cos(-pi/2)]? | Socratic")
How do you evaluate cos^-1[cos(-pi/2)]? | Socratic
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File:Raspberry Pi 2 Model B v1.1 top new (bg cut out).jpg - Wikimedia Commons
Ex 2.2, 20 (MCQ) - Find sin (pi/3 - sin-1 (-1/2)) - Class 12 NCERT
Basel problem - Wikipedia
