Question: 3. [1 (a) If A 2 12 212 21 1 2 then prove that A2-4A-5= 0. 2 1 (b) Find value of tan3A in

3. [1 (a) If A 2 12 212 21 1 2 then

3. [1 (a) If A 2 12 212 21 1 2 then prove that A2-4A-5= 0. 2 1 (b) Find value of tan3A in terms of tanA

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