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Answer:
sin(Z) = 3/5
cos(Z) = 4/5
Step-by-step explanation:
The mnemonic SOH CAH TOA reminds you how to do this.
Sin = Opposite/Hypotenuse
sin(Z) = XY/XZ = 9/15
sin(Z) = 3/5 . . . . . reduced fraction
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Cos = Adjacent/Hypotenuse
cos(Z) = YZ/XZ = 12/15
cos(Z) = 4/5 . . . . . reduced fraction
