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plese explain, thank you!

 Apr 23, 2020
 #1
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+2

        theta  =  -7·pi / 6

tan(theta)  =  tan( -7·pi / 6 )

tan(theta)  =  - sqrt(3) / 3

     y / x     =  - sqrt(3) / 3

            y  =  (  - sqrt(3) / 3 ) · x

 Apr 23, 2020
 #2
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+1

Thank you so much!

Guest Apr 23, 2020

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