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Maths-

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Question

The value of $cos space y cos space left parenthesis pi divided by 2 minus x right parenthesis minus cos space left parenthesis pi divided by 2 minus y right parenthesis cos space x plus sin space y cos space left parenthesis pi divided by 2 minus x right parenthesis plus cos space x sin space left parenthesis pi divided by 2 minus y right parenthesis$ is Zero if

x=0
y=0
x=y
$x = n π - π / 4 + y (n \in I)$

The correct answer is: $x equals n pi minus pi divided by 4 plus y left parenthesis n element of I right parenthesis$

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