Question

Please help me with this question

Answer 1

$\cos B=\dfrac{6.3}{9.8}\implies B=\cos^{-1}\dfrac{6.3}{9.8}$
$\sin B=\dfrac{7.5}{9.8}\implies B=\sin^{-1}\dfrac{7.5}{9.8}$

These are the only two correct choices.