Question

Evaluate tan 2A if tan A = ¼

Answer 1

Answer:

Given : tanA = ¼

We know that, Tan2A = 2tanA

1 - tan²A

= 2(¼)

1-(tanA)²

= ½

1 - tanA. tanA

= ½

1 - ( ½×½)

= ½

1 - ¼

= ½

¾

= 1 × 4

2 3

= ⅔

Also Refer this is model in ur text book

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