(Q14)In the right angled triangle ABC with right angle at B,in which a=24 units,b=25 units and ∠BAC =θ then,find cosθ and tanθ
25cm
A
B
C
24cm
Solution:
Given:
AC=25cm BC=24cm
From the figure
AC
2
=AB
2
+BC
2
AB
2
=AC
2
-BC
2
AB
2
=
AB=
cm
Now,
cosθ=
AB
AC
=
tanθ=
BC
AB
=
clear