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Using tan (A - B) = , find the value of tan15°.

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SSC CGL 2023 Tier-I Official Paper (Held On: 18 Jul 2023 Shift 4)
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  1.  + 1
  2.  - 1
  3. 2 - 
  4. 2 + 

Answer (Detailed Solution Below)

Option 3 : 2 - 
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Detailed Solution

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Given:

tan (A - B) = ,

Calculation:

 Tan15° = Tan ( 45° - 30°)

⇒  

⇒ 

⇒ (√3 - 1) / (√3 + 1) = 2 - 

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