Question

Find the value of y. Round your answer to the nearest tenth.

Answer 1

$\huge \boxed { \sf Answer}$

$\cos(21°) = \frac{9}{y} \\ = > 0.9336 = \frac{9}{y} \\ = > \frac{y}{9} = 0.9 336\\ = > y = 9 \times 0.9336 \\ = > y = 8.4024 \\ = > y = 8.4$

Hope you could understand.

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