AP EAMCET Engineering 17 Sep 2020 Shift 2 Paper

Section: Mathematics
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Question : 11 of 160
 
Marks: +1, -0
If
∫
cos(13x)−cos(14x)
1+2‌cos(9x)
d
x
=
sin(4x)
a
−
sin(5x)
b
+c
,
then ab=
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