Question

what is 0 in radians when sin0 = √2/2?

Answer 1

The user needs to learn how to copy/paste special characters, or substitute a letter (such as x). The question should have been

what is θ in radians when sinθ = √2/2?
and of course, the answer would be
θ = π/4 or 3π/4

Answer 2

If sin(0) = √2/2, then 0 in radians would be 0.

Answer 3

Apologies for the misunderstanding. If sin(θ) = √2/2, where θ represents an unknown angle in radians, the possible values for θ would be θ = π/4 or θ = 3π/4.