tanA =1/2 then, tan2A =?
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tan 2A = 2 tan A/1- tan² A
substituting tan A value in the above
we get tan 2 A = 2 * 1/2
----------
1- (1/2)²
⇒1
----
1-1/4
1
---
3/4
= 4/3
substituting tan A value in the above
we get tan 2 A = 2 * 1/2
----------
1- (1/2)²
⇒1
----
1-1/4
1
---
3/4
= 4/3
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