tan∠A = CD/AD = 2CD/AB
CD = 22÷2×tan22° = 11×0.404 = 4.44 米;
cos∠A = AD/AC = AB/(2AC)
AC = 22÷2÷cos22° = 11÷0.9272 = 11.86 米.
tan∠A = CD/AD = 2CD/AB
CD = 22÷2×tan22° = 11×0.404 = 4.44 米;
cos∠A = AD/AC = AB/(2AC)
AC = 22÷2÷cos22° = 11÷0.9272 = 11.86 米.