To find the value of x, we can use the inverse sine function (also known as arcsine) to solve for x.

sin(x + 15°) = 1/2

Taking the inverse sine of both sides:

x + 15° = arcsin(1/2)

Using a calculator or reference table, we find that arcsin(1/2) = 30°.

Subtracting 15° from both sides:

x = 30° - 15°

x = 15°

Therefore, the value of x is 15°.