Answer
A
Work Step by Step
$\sin \left( A-B\right) =\sin A\cos B-\cos A\sin B\Rightarrow 8\rightarrow A$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.