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Byju's Answer
Standard XII
Mathematics
Standard Limits to Remove Indeterminate Form
Maximum and m...
Question
Maximum and minimum value of sinx.sin(60-x)sin(60+x) is
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Solution
Dear Student,
Let
y
=
sin
x
.
sin
60
+
x
.
sin
60
-
x
⇒
y
=
sin
x
sin
2
60
°
-
sin
2
x
⇒
y
=
sin
x
3
2
2
-
sin
2
x
⇒
y
=
sin
x
3
4
-
sin
2
x
⇒
y
=
1
4
3
sin
x
-
4
sin
3
x
⇒
y
=
1
4
sin
3
x
Maximum
value
of
sin
3
x
=
1
So
,
maximum
value
of
y
=
1
4
×
1
=
1
4
Now
,
minimum
value
of
sin
3
x
=
-
1
So
,
minimum
value
of
y
=
1
4
×
-
1
=
-
1
4
Regards
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