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Byju's Answer
Standard XII
Mathematics
Principal Solution of Trigonometric Equation
If sinθ-√6c...
Question
If
sin
θ
−
√
6
cos
θ
=
√
7
cos
θ
. Prove that
cos
θ
−
√
6
sin
θ
−
√
7
sin
θ
=
1
.
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Solution
→
sin
θ
−
√
6
cos
θ
=
√
7
cos
θ
→
tan
θ
=
√
6
+
√
7
→
cot
θ
(
√
6
+
√
7
)
=
1
→
√
6
sin
θ
+
√
7
sin
θ
=
cos
θ
→
cos
θ
−
√
6
sin
θ
−
√
7
sin
θ
=
1
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Similar questions
Q.
If
2
cos
θ
+
sin
θ
=
1
(
θ
≠
π
2
)
, then
7
cos
θ
+
6
sin
θ
is equal to:
Q.
Assertion :If
2
cos
θ
+
sin
θ
=
1
(
θ
≠
π
2
)
then the value of
7
cos
θ
+
6
sin
θ
is
2
Reason: If
cos
2
θ
−
sin
θ
=
1
2
,
0
<
θ
<
π
2
, then
sin
θ
+
cos
6
θ
=
0
Q.
Prove that:
1
+
cos
θ
+
sin
θ
1
+
cos
θ
−
sin
θ
=
1
+
sin
θ
cos
θ
Q.
Solve
6
sin
θ
+
7
cos
θ
=
9
if
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Standard XII Mathematics
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