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How many values of x with 0<=x<=990 satisfy sin (x)= -0.31?

 

I don't know how to solve these types of problems. I think it has something to do with the unit circle, but I'm not sure. 

Also, sorry if you do not understand my problem, as I couldn't use LaTeX for it. 

Thanks!

 Aug 5, 2018
edited by Guest  Aug 5, 2018
edited by Guest  Aug 5, 2018
 #1
avatar+33603 
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Perhaps this will help:

 

Note the number of repetitions every 360°.

 Aug 5, 2018

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