[Sahas2711]

Summary

Changed torch.exp(x) to torch.sin(x) in the polynomial autograd tutorial (beginner_source/examples_autograd/polynomial_autograd.py).

Problem

The tutorial's docstring states it is trained to predict y = sin(x), but line 31 computed y = torch.exp(x). This made the tutorial learn a different function than the one described and used elsewhere in the series.

Solution

Replaced the incorrect torch.exp(x) with torch.sin(x) so the targets match the documented y = sin(x). No other changes; the polynomial model (y = a + b x + c x^2 + d x^3) and training loop are unchanged.

Testing

• git diff --check — no whitespace errors.
• Single-line change; Python syntax unchanged (was valid, remains valid).
• Full tutorial execution requires GPU shards and could not be run in this environment.

Changes

• beginner_source/examples_autograd/polynomial_autograd.py — torch.exp(x) → torch.sin(x)

Issue reference

Closes #3996

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🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/tutorials/3997

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