The given triangle is a right angle traingle. Taking angle 24 degrees as the reference angle,
hypotenuse = 10
Opposite side = 4
Adjacent side = x
If we apply the tangent trigonometric ratio which is expressed as
Tan# = opposite side/adjacent side
where # is the reference angle, then
Tan 24 = 4/x
If we apply the cosine trigonometric ratio which is expressed as
Cos# = adjacent side/hypotenuse
where # is the reference angle, then
Cos 24 = x/10
If we apply the Sine trigonometric ratio which is expressed as
Sin# = opposite side/hypotenuse
where # is the reference angle, then
Sin 24 = 4/10
Looking at the given options, the correct option is D