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Byju's Answer
Standard XII
Mathematics
Trigonometric Ratios of Multiples of an Angle
If α+β=π/2 an...
Question
If
α
+
β
=
π
2
and
β
+
γ
=
α
,
then tan
α
equal to
A
2
(
tan
β
+
tan
γ
)
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B
tan
β
+
tan
γ
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C
tan
β
+
2
tan
γ
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D
2
tan
β
+
tan
γ
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Solution
The correct option is
C
tan
β
+
2
tan
γ
α
+
β
=
π
2
⇒
α
=
π
2
−
β
⇒
tan
α
=
cot
β
⇒
tan
α
tan
β
=
1
.
.
.
(
1
)
Again,
β
+
γ
=
α
⇒
γ
=
α
−
β
⇒
tan
γ
=
tan
α
−
tan
β
1
+
tan
α
tan
β
⇒
tan
γ
=
tan
α
−
tan
β
2
[
from eq.
(
1
)
]
⇒
tan
α
=
tan
β
+
2
tan
γ
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Trigonometric Ratios of Multiples of an Angle
Standard XII Mathematics
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