Answer:
51.3°
Explanation:
The mnemonic SOH CAH TOA reminds you ...
Tan = Opposite/Adjacent
For angle y, the opposite side is 10 cm, and the adjacent side is 8 cm. Then you have ...
tan(y) = (10 cm)/(8 cm)
y = arctan(1.25) ≈ 51.3402° ≈ 51.3°
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