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Maka,
cos Z = 20/24
cos Z = 5/6
Maka,
cos Z = YZ/XZ
YZ = 5
XZ = 6
Sehingga,
Dengan XZ sisi miringnya, didapat:
XY = √11
Didapat:
tan X = YZ/XY
tan X = 5/√11
tan X = 5/11 √11
tan Z = XY/YZ
tan Z = √11 / 5
tan Z = 1/5 √11