div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentcovid-19-latest-updates-and-letters-the-derivatives-of-the-other-trig-functionshtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: COVID-19 Latest Updates and Letters · The derivatives of the other trig functions can be derived by using the ones above Each proof makes use of the trig identity sin x + cos loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader035fdocumentsnetreader035viewer20220708225f25d2d31f3cbc1591546b6ahtml5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentcovid-19-latest-updates-and-letters-the-derivatives-of-the-other-trig-functionshtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: COVID-19 Latest Updates and Letters · The derivatives of the other trig functions can be derived by using the ones above Each proof makes use of the trig identity sin x + cos loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader035fdocumentsnetreader035viewer20220708225f25d2d31f3cbc1591546b6ahtml5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentcovid-19-latest-updates-and-letters-the-derivatives-of-the-other-trig-functionshtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: COVID-19 Latest Updates and Letters · The derivatives of the other trig functions can be derived by using the ones above Each proof makes use of the trig identity sin x + cos loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...