Объяснение:
sina=cosb=1/5*sqrt(12)
sinb=sqrt(1-cos^2 b)=sqrt(1 - (1/5*sqrt(12))^2)=1/5*sqrt(13)
tgb=sinb/cosb=sqrt(13)/sqrt(12)
ctgb=1/tgb=sqrt(12)/sqrt(13)
Объяснение:
sina=cosb=1/5*sqrt(12)
sinb=sqrt(1-cos^2 b)=sqrt(1 - (1/5*sqrt(12))^2)=1/5*sqrt(13)
tgb=sinb/cosb=sqrt(13)/sqrt(12)
ctgb=1/tgb=sqrt(12)/sqrt(13)