Sunday, November 15, 2015

trigonometry - How were these values of sin x found?

I'm working on Trigonometry problems that have to do with inverse functions.



So I have an example problem that goes like this:



 10sin2x=sinx




and apparently the solution set is:



sinx=0 if x=0.0,3.1



and sinx=1/10 if x=0.1,3.0



I know how to do these problems in terms of radians, but I don't know what these integers are referring to on the unit circle, because when I assume that 1 = 360 degrees, the equations still don't make sense.



Can someone please help me with how these values were computed? I can't find any examples in my textbook.




Thank you!

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