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Byju's Answer
Standard X
Mathematics
Relation between Trigonometric Ratios
The value of ...
Question
The value of
sin
70
°
sin
110
°
is _____________.
Open in App
Solution
sin
70
°
sin
110
°
=
sin
70
°
sin
90
°
+
20
°
=
sin
70
°
cos
20
°
Since
sin
90
°
+
θ
=
cos
θ
=
sin
70
°
cos
90
°
-
70
°
=
sin
70
°
sin
70
°
=
1
∵
cos
90
°
-
θ
=
sin
θ
Hence
sin
70
°
sin
110
°
=
1
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