(Q4)Find (i)sin C(ii)cos C and (iii)tan C in the adjacent triangle
A
B
C
5cm
13cm
Answer:
By pythagoras theroem,
BC=5
CA=13
CA
2
=BC
2
+AB
2
2
=
2
+(AB)
2
(AB)
2
=
-
(AB)
2
=
AB=
(i)sin C=
AB
AC
=
(ii)cos C=
BC
AC
=
(iii)tan C=
AB
BC
=
clear