Question

In figure below AABC is right angled at B and tan A=. If AC = 15 cm the length of AB is ​

Answer 1

Answer:

⇒AB=

4

3

BC

Now, in △ABC

AB

2

+BC

2

=AC

2

(

4

3

BC)

2

+BC

2

=15

2

⇒

16

25

BC

2

=15

2

⇒BC

2

=

5

2

15 2 ×4 2⇒BC=12Therefore, Answer is 12 cm