WBJEE 2022 Math Solved Paper

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Question : 53 of 75
 
Marks: +1, -0
If the transformation z=log‌tan‌
x
2
reduces the differential equation ‌
d2y
dx2
+cot‌x‌
dy
dx
+4ycosec‌2x
=0
into the form ‌
d2y
dz2
+ky
=0
then k is equal to
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