WordPress.com · 2016. 2. 21. · 1+tan2a= cos 1+cot2a= sin (1 cosct — (ct#kr) cosx+l=l) J (2)...
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WordPress.com · 2016. 2. 21. · 1+tan2a= cos 1+cot2a= sin (1 cosct — (ct#kr) cosx+l=l) J (2) tan3 y+2tqn x+3tan§£0 3 . tijnj P Tel: 435373 sin a — sin tan = cos cosa — COS