@prefix concept: <https://w3id.org/kmath/concept/> .
@prefix math: <https://w3id.org/kmath/> .
@prefix problem_type: <https://w3id.org/kmath/problem_type/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix skill: <https://w3id.org/kmath/skill/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix solution_pattern: <https://w3id.org/kmath/solution_pattern/> .

solution_pattern:quadratic_form_trig_equation a math:SolutionPattern ;
    rdfs:label "이차식 꼴 삼각방정식·부등식 풀기"@ko ;
    skos:definition "사인·코사인이 섞인 이차식을 한 종류로 통일해 이차방정식(부등식)으로 풀고 각으로 되돌리는 전략"@ko ;
    skos:editorialNote "2026-09-28 GRIP 대수 개념서와 시발점 워크북 대수의 풀이를 분석해 추가했다(근거: GRIP 06-11 예제·실전 019, GRIP 06-13 예제·실전 024, 시발점 Theme 19 #24, #26, #31, 시발점 STEP 2 #3). 교사 검토가 필요하다."@ko ;
    skos:prefLabel "이차식 꼴 삼각방정식·부등식 풀기"@ko ;
    math:appliesTo problem_type:trig_equation_solve,
        problem_type:trig_inequality_solve ;
    math:hasStep [ ],
        [ ],
        [ ],
        [ ] ;
    math:requiresConcept concept:trigonometric_equation,
        concept:trigonometric_identity,
        concept:trigonometric_inequality ;
    math:usesSkill skill:angle_reduction,
        skill:substituted_variable_range,
        skill:substitution_to_quadratic,
        skill:trig_identity_substitution .