31(sin−1(109)),
3π−31(sin−1(109)),
32π+31(sin−1(109)),
π−31(sin−1(109)),
34π+31(sin−1(109)),
35π−31(sin−1(109))
원본 교재 풀이(영어)
31(sin−1(109)),
3π−31(sin−1(109)),
32π+31(sin−1(109)),
π−31(sin−1(109)),
34π+31(sin−1(109)),
35π−31(sin−1(109))