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adelina 88 [10]
4 years ago
6

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

Mathematics
1 answer:
AysviL [449]4 years ago
6 0
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


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