div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=document1-7k-1-7-cos2a1-31-2-sin-a-sinb-023-seiun-hschp1pdfsuu12pdfhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: 1 7kŒ 1 7 +cos2A=1 31 2 sin A sinB 023 …seiun-hschp1pdfsuu1_2pdf1 7kŒ 1 7 +cos2A=1 31 2 sin A sinB 023 cosi30= 097 tan 130 = 10 130 023 2 sin 130 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsecreader034viewer20220422115eb3ed7b49f94d5ce9758769html5thumbnails1jpg width=140 height=200 divdiv