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Byju's Answer
Standard XIII
Mathematics
Trigonometric Ratios of Compound Angles: Tangent and Cotangent Functions
If tan A,tan ...
Question
If
tan
A
,
tan
B
are the roots of quadratic equation
a
x
2
+
3
x
+
4
=
0
,
a
≠
0
and
tan
A
cot
B
−
tan
A
=
1
3
, then the value of
a
is
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Solution
∵
tan
A
and
tan
B
are the roots of
a
x
2
+
3
x
+
4
=
0.
⇒
tan
A
tan
B
=
4
a
So,
tan
A
cot
B
−
tan
A
=
1
3
⇒
tan
A
tan
B
1
−
tan
A
tan
B
=
1
3
⇒
4
a
1
−
4
a
=
1
3
⇒
4
a
−
4
=
1
3
⇒
a
=
16
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Standard XIII Mathematics
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