а = 6; ctg(alpha) = 0.75: c - ?
c = (a^2 + b^2)^0.5
ctg(alpha) = a/b
b = a/ctg(alpha) = 6/0.75 = 8
c = (36 + 64)^0.5 = 10
а = 6; ctg(alpha) = 0.75: c - ?
c = (a^2 + b^2)^0.5
ctg(alpha) = a/b
b = a/ctg(alpha) = 6/0.75 = 8
c = (36 + 64)^0.5 = 10