1.

cos^(-1)(x//a)+cos^(-1)(y//b)=theta,then (x^(2))/(a^(2))-(2xy)/(ab)cos theta+(y^(2))/(b^(2))=

Answer»

`SIN^(2)THETA`
`COS^(2)theta`
`TAN^(2)theta`
`cot^(2)theta`

Answer :A


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