Q. 93.8( 5 Votes )

If x cos A = 1 and tan A = y, then what is the value of x2 – y2.

Answer :

Given x cos A = 1 and tan A =y


and


To find: x2 – y2


Putting tha values of x and y , we get





[ cos2 θ + sin2 θ = 1]


= 1


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