∫_0^a f(x)dx = ∫_0^a f(a−x)dx (∫_0^a f(x)dx = ∫_0^a f(a−x)dx)

jee-mainjee-advanced

∫_0^a f(x)dx = ∫_0^a f(a−x)dx

When to use this

Special case of King on [0,a].