Answer:
? = 46
Explanation:
Since this is a right triangle, we can use trig functions
sin theta = opp/ hypotenuse
sin ? = 38 / 53
Take the inverse sin of each side
sin ^-1 ( sin ?) = sin ^-1 ( 38/53)
? = sin ^-1 ( 38/53)
? =45.80579628
To the nearest degree
? = 46