class

SinBackward

SinBackward

Autograd node for element-wise sine $y = \sin(x)$ .

Saves the input x so the backward pass can evaluate $\cos(x)$ and scale the upstream gradient by it. The input is interpreted in radians.

Math

\frac{\partial y}{\partial x} = \cos(x), \qquad \frac{\partial \mathcal{L}}{\partial x} = \cos(x)\,\frac{\partial \mathcal{L}}{\partial y}.$$

schema_v1OpSchema

Registered as "sin" with AmpPolicy::Promote.

Dispatch: Accelerate vvsinf/vvsin (CPU) / MLX sin (GPU).

Static methods

static

int dispatch(backend::IBackend & be, const int & a, const int & s, Dtype dt)

Forward — calls IBackend::sin to compute $y = \sin x$ .

int grad_formula(const int & g)

Backward — $\partial y/\partial x = \cos x$ , scaled by grad_out.