1) tgA=1/3sqrt(11). Найдите sinA
2) tgB=4/3. Найдите cosA.
sim^2A = 1/1+9*11
sim^2A = 1/100
simA = √(1/100)
simA = 1/10
simA = 0.1
Ответ:simA = 0.1
2)cos^2A = 1/1+tg^2B
cos^2A = 1/(1+16/9)
cos^2A = 1/(25/9)
cos^2A = 9/25
cosA = √(9/25)
cosA = 3/5
cosA = 0.6
Ответ:cosA = 0.6