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Byju's Answer
Standard VII
Mathematics
RHS Criteria for Congruency
97.If in tria...
Question
97.If in triangle ABC,right angled at B,sinC=a2-b2/a2+b2,then cosC=?
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Similar questions
Q.
In triangle
△
A
B
C
, with usual notation, then
cos
A
=
b
2
+
c
2
−
a
2
2
b
c
,
cos
B
=
c
2
+
a
2
−
b
2
2
c
a
,
cos
C
=
a
2
+
b
2
−
c
2
2
a
b
Q.
In a triangle
A
B
C
,
if
a
2
+
b
2
a
2
−
b
2
sin
(
A
−
B
)
=
1
and the triangle is not right angled, then
cos
(
A
−
B
)
=
Q.
If in any triangle
A
B
C
;
a
2
−
b
2
a
2
+
b
2
=
sin
(
A
−
B
)
sin
(
A
+
B
)
, then the triangle is
Q.
In any triangle,if
a
2
−
b
2
a
2
+
b
2
=
sin
(
A
−
B
)
sin
(
A
+
B
)
then prove that the triangle is either right angled or isosceles.
Q.
In a triangle
A
B
C
with usual notation, which of the following is (are) CORRECT?
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