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Need help on this page in my performance task !! Thank you so much if you help !! <3

Need help on this page in my performance task !! Thank you so much if you help !! <3
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Need help on this page in my performance task !! Thank you so much if you help !! <3

Need help on this page in my performance task !! Thank you so much if you help !! &lt-example-1
User Choobablue
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1 Answer

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in the triangle XYB
cos(x)=XY/XB

in the triangle AYZ
cos(z)=YZ/AZ
we know that
cos(x)=cos(z) and XY=YZ

therefore
XY/XB=YZ/AZ-------------- > (XY/YZ)=(XB/AZ) remember that XY=YZ
1=(XB/AZ)---------- > XB=AZ---------- > the statement was proved


User Mosheh
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