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The given expression sec^2 theta =(4xy)/...

The given expression `sec^2 theta =(4xy)/((x+y)^(2))` is true if and only if :

A

`x+y cancel ( = ) 0`

B

`x=y, x cancel(=)0`

C

x=y

D

`x cancel ( = ) 0, y cancel ( =) 0`

Text Solution

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The correct Answer is:
C
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