А7
АС=\/100-19=\/81=9
cosA=AC/AB
cosA=9/10=0,9
2)sinB=AC/AB
AC=\/225-189=\/36=6
sinB=6/15=2/5=0,4
A8
1)BC/AC=tgA
BC/48=7/24
BC=14
AB=\/196+2304=\/2500=50
А7
АС=\/100-19=\/81=9
cosA=AC/AB
cosA=9/10=0,9
2)sinB=AC/AB
AC=\/225-189=\/36=6
sinB=6/15=2/5=0,4
A8
1)BC/AC=tgA
BC/48=7/24
BC=14
AB=\/196+2304=\/2500=50