div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentteachingbd-2018-03-14-376-ans-3-tan200-tan-200-i-3-tan-600-a-yhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: Teachingbd · 2018-03-14 · 376 Ans 3 tan200 - tan 200 I -3 = tan 600 A = + + y cos a cos COs J I — tan a = I + tan 16 cosA cos 2A cos 4A cos 7A = I a + = cos2p = cos2p loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader031fdocumentsnlreader031viewer20220130205ebb7fc7f64d3a1ee46fd4a9html5thumbnails1jpg width=140 height=200 divphttp:teachingbdcomp pTeachp pingbdcop pmp div class=annotationa href=http:teachingbdcom rel=ugc nofollow target=_blankhttp:teachingbdcomadiv div class=annotationa href=http:teachingbdcom rel=ugc nofollow target=_blankhttp:teachingbdcomadivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentteachingbd-2018-03-14-376-ans-3-tan200-tan-200-i-3-tan-600-a-yhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: Teachingbd · 2018-03-14 · 376 Ans 3 tan200 - tan 200 I -3 = tan 600 A = + + y cos a cos COs J I — tan a = I + tan 16 cosA cos 2A cos 4A cos 7A = I a + = cos2p = cos2p loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader031fdocumentsnlreader031viewer20220130205ebb7fc7f64d3a1ee46fd4a9html5thumbnails2jpg width=140 height=200 divphttp:teachingbdcomp pTeachp pingbdcop pmp div class=annotationa href=http:teachingbdcom rel=ugc nofollow target=_blankhttp:teachingbdcomadiv div class=annotationa href=http:teachingbdcom rel=ugc nofollow target=_blankhttp:teachingbdcomadivdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentteachingbd-2018-03-14-376-ans-3-tan200-tan-200-i-3-tan-600-a-yhtmlpage=3...