{
  "unit": 3,
  "standards": [
    "Trigonometric integrals",
    "Power-reduction identities",
    "Odd/even power strategies",
    "Trigonometric substitution",
    "Back-substitution",
    "Domain restrictions",
    "Exact verification"
  ],
  "evidence": [
    "lesson derivations",
    "pathway problem set",
    "investigation",
    "mastery check",
    "portfolio correction"
  ]
}