Byju's Answer
Standard XII
Mathematics
Sin(A+B)Sin(A-B)
Prove that 1+...
Question
Prove that
1
+
t
a
n
2
A
1
+
c
o
t
2
A
=
t
a
n
2
A
.
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Solution
1
+
t
a
n
2
A
1
+
c
o
t
2
A
=
1
+
t
a
n
2
A
1
+
1
t
a
n
2
A
=
1
+
t
a
n
2
A
t
a
n
2
A
+
1
t
a
n
2
A
=
(
1
+
t
a
n
2
A
)
(
t
a
n
2
A
)
(
t
a
n
2
A
+
1
)
=
t
a
n
2
A
.
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Sin(A+B)Sin(A-B)
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