div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader043fdocumentpubreader043viewer20220119045f1b920957a427707b571057html5page1jpg target=_blank img data-url=documentbenesseioefffffff-2-30-b-60-ok-next-o-c4-sii-sin-45-sinhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Benesse|ベネッセグループ · -2 30 b 60 OK NEXT O c=4 SIIÄ sin 45 sin 4 sin 60 sin45 60 45 Sin B Sin C 3 cos 60 5 19 2bccosA 2ca cos B 2ab cos C — 25+9— — 25+9— loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentpubreader043viewer20220119045f1b920957a427707b571057html5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader043fdocumentpubreader043viewer20220119045f1b920957a427707b571057html5page2jpg target=_blank img data-url=documentbenesseioefffffff-2-30-b-60-ok-next-o-c4-sii-sin-45-sinhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: Benesse|ベネッセグループ · -2 30 b 60 OK NEXT O c=4 SIIÄ sin 45 sin 4 sin 60 sin45 60 45 Sin B Sin C 3 cos 60 5 19 2bccosA 2ca cos B 2ab cos C — 25+9— — 25+9— loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentpubreader043viewer20220119045f1b920957a427707b571057html5thumbnails2jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imagea href=https:reader043fdocumentpubreader043viewer20220119045f1b920957a427707b571057html5page3jpg target=_blank img data-url=documentbenesseioefffffff-2-30-b-60-ok-next-o-c4-sii-sin-45-sinhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: Benesse|ベネッセグループ · -2 30 b 60 OK NEXT O c=4 SIIÄ sin 45 sin 4 sin 60 sin45 60 45 Sin B...