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Answer:
[tex]x = 14 \sqrt{3} \\ \\ y = 7 \sqrt{3} [/tex]
Step-by-step explanation:
[tex] \sin(60) = \frac{21}{x} \\ \\ x = 14 \sqrt{3} [/tex]
[tex] \tan(60) = \frac{21}{y} \\ \\ y = 7 \sqrt{3} [/tex]