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The equation of tangents to the curve y=...

The equation of tangents to the curve `y=cos(x+y), -2pi le x le 2pi` that are parallel to the line `x+2y=0`, is

A

x+2y=1

B

x+2y=`pi//2 `

C

`x+ 2y =pi//4`

D

None of these

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The correct Answer is:
B
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ML KHANNA-TANGENTS AND NORMALS-SELF ASSESSMENT TEST (MULTIPLE CHOICE QUESTIONS)
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