Question 582150
How do I convert a decimal answer to a radical such as sin 7π  divided by 6? I know it’s going to be a radical answer but how do I know what the right radical answer is? 
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If 7pi/6 is the angle in radians,
sin(7pi/6) = -0.5
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I don't know what you mean about the radical???
{{{-0.5 = sqrt(0.25)}}} maybe?