1.

Asertion :2 tan^(-1) x = cos^(-1) ((1-x^(2))/(1+x^(2))) Reason(1- tan^(2) theta)/(1+tan^(2)theta ) = cos 2 thetaand cos^(-1) ( cos theta ) = theta

Answer»

To PROVE (A),(R ) is the correctclue .
(R ) is not sufficent to prove (A)
(A) is not TRUE
(A) is true but (R ) is not true

ANSWER :a


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