004 Components of a 3D force with given angles

$A_{xy} = A \sin 30^\circ$

$A_{xy} = 0.5A$
 

$A_y = A_{xy} \sin 40^\circ$

$A_y = (0.5A) \sin 40^\circ$

$A_y = 0.321A$
 

$\cos \theta_y = 0.321$

$\theta_y = 71.3^\circ$
 

Answer: D