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[" 13.If "A=30^(@)" ,verify that: "],[qq...

[" 13.If "A=30^(@)" ,verify that: "],[qquad " (i) "sin2A=(2tan A)/(1+tan^(2)A)]

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If A=30^(@) , verify that (i) sin2A=(2tanA)/(1+tan^(2)A) (ii) cos2A=(1-tan^(2)A)/(1+tan^(2)A) (iii) tan2A=(2tanA)/(1-tan^(2)A)

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