JEE Mains 04-Sep-2020 Shift 1 Solved Paper

Section: Mathematics

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Question : 70 of 75

Marks: +1, -0

If (a+√2b‌cos‌x)(a−√2b‌cos‌y) =a2−b2where a>b>0, then

dx

dy

at (

π

4

,

π

4

) is :

[4 Sep 2020 Shift 1]

a−b
a+b
a+b
a−b
2a+b
2a−b
a−2b
a+2b

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