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Question

If 2cos-11+x2=π2,then x=


A

1

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B

0

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C

-12

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D

12

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Solution

The correct option is B

0


Explanation for the correct options:

Finding the value:

Given Data,

2cos-11+x2=π2

cos-11+x2=π4

1+x2=cosπ4

1+x2=12

1+x=1

x=0

Hence, Option (B) is correct.


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