Mathematics
Senior High
![AM [ｱﾑ] ·͜·✌︎´-](https://d1e9oo257tadp1.cloudfront.net/uploads/user/avatar/4982760/thumb_s_e1c6b8355f.jpg?Expires=1782156173&Signature=EwURjLXDPF77qfKNq0ZAZLzYgAYi-cNUuqT9KJqqSGUPhceHTOdwDcuY~YN-Q~K81xjdLLLsxHHV5GsMoC1MQmn6VD~8DfeiW7aqe2pZJqkFt6Cb1ZSsaDJeYENWrAzN6R8nulsbIuDY7zum2QRIwZAIfuLSemFGpNJdP4SBZ~UIg8pGcff5pKsDjcMxM6bXWDHPzu8eZhlCkEPk71bt3CHpbJ-~-ZSgGqg2tckl6PMcUQBRrFMeFsP3SFWD3fCyY15dAvtqSOEWgs39hNw8xetxf59tQYC1ouXNQY3xM8XOHRX1PzsxTeU7CKSsUUCmNk2PMTZMzYNSXE-HKT66Hw__&Key-Pair-Id=K2W722D70GJS8W)
なぜ赤文字の部分から下の答えになるのですか？早めでお願いします。
(2) S=casinB +5√2 = 2√6.√2 sinB
ゆえに sin B=
2
√ 6
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