1.

(i) "sin" 2theta=….........(in terms of "tan" theta). (ii) cos 2theta…..........(in terms of "tan" theta). (iii) "tan" 2theta…........(in terms of "tan" theta).

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Answer :(i) `(2"tan" theta)/(1+"tan"^(2)theta)` (II) `(1-"tan"^(2)theta)/(1+"tan"^(2)theta)` (III) `(2"tan" theta)/(1-"tan"^(2)theta)`


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