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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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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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