Alfa y beta
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sen(a+b) =sena·cosb+cosa·senb
cos(a+b) =cosa·cosb-sena·senb
tg(a+b)= tga+tgb / 1-tga·tgb
sen2a=2·sena·cosa
cos2a=cos2a-sen2a
tg2a= 2tga / 1-tg2a
sen a/2= ?1-cosx/2 (todo dentro)
cos a/2= ?1+cosa/2 (todo dentro)
tg a/2=?1-cosa/1+cosa (todo dentro)
senA+senB=2senA+B/2·cosA-B/2
senA-senB=2cosA+B/2·senA-B/2
cosA+cosB=2cosA+B/2·cosA-B/2
cosA-cosB= -2senA+B/2·senA-B/2
cos(a+b) =cosa·cosb-sena·senb
tg(a+b)= tga+tgb / 1-tga·tgb
sen2a=2·sena·cosa
cos2a=cos2a-sen2a
tg2a= 2tga / 1-tg2a
sen a/2= ?1-cosx/2 (todo dentro)
cos a/2= ?1+cosa/2 (todo dentro)
tg a/2=?1-cosa/1+cosa (todo dentro)
senA+senB=2senA+B/2·cosA-B/2
senA-senB=2cosA+B/2·senA-B/2
cosA+cosB=2cosA+B/2·cosA-B/2
cosA-cosB= -2senA+B/2·senA-B/2