If (x)/(a)-(y)/(b) tan theta =1 and (x)/...

If `(x)/(a)-(y)/(b) tan theta =1 and (x)/(a) tan theta +(y)/(b)=1`, then the value of `(x^(2))/(a^(2))+(y^(2))/(b^(2))` is

A

`2 sec^(2)theta`

B

`sec^(2)theta`

C

`cos^(2)theta`

D

`2cos^(2)theta`

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