Question

pls solve this question

Answer 1

hope you got it... clearly..

Answer 2

$\sin(2 {sin}^{ - 1} (0.8)) \\ = \sin(2 {sin}^{ - 1} ( \frac{4}{5} ) ) \\ \sin(2(53°)) \\ = \sin(106°)$
hope it will help you!!