code: def cos_17() -> Expr:
      r"""Computes $\cos \frac{\pi}{17}$ in square roots"""
      return sqrt(
          (15 + sqrt(17)) / 32
          + sqrt(2)
          * (
              sqrt(17 - sqrt(17))
              + sqrt(
                  sqrt(2)
                  * (
                      -8 * sqrt(17 + sqrt(17))
                      - (1 - sqrt(17)) * sqrt(17 - sqrt(17))
                  )
                  + 6 * sqrt(17)
                  + 34
              )
          )
          / 32
      )
  
file_path: sympy/sympy/functions/elementary/_trigonometric_special.py
imports: from __future__ import annotations
  from typing import Callable
  from functools import reduce
  from sympy.core.expr import Expr
  from sympy.core.singleton import S
  from sympy.core.intfunc import igcdex
  from sympy.core.numbers import Integer
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.core.cache import cacheit
label_desc: Use image node_id 6 for calling a global function with example usage: cos_17() and returns: sqrt