1.

if tan theta= b/a, then the value of cos2theta is(1) a^2-b^2(2)a^2+b^2(3)a^2-b^2/a^2+b^2(4)a^2/b^2

Answer» if tan theta= b/a, then the value of cos2theta is
(1) a^2-b^2
(2)a^2+b^2
(3)a^2-b^2/a^2+b^2
(4)a^2/b^2


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