Question

Tan45=ab/bc ,Bc=80 find ab

Answer 1

Answer:Tan45°= Ab/BC

1=ab/BC

AB=BC

Tan30°= AB/BD

1/√3= AB/BD

1/√3=AB/BC+20

1/√3=AB/AB+20

AB+20=√3AB

20=√3AB-AB

20=AB(√3-1)

20=AB(0.732). (taking √3=1.732)

AB=20/0.732

therefore, AB=BC= 27.322

Step-by-step explanation: