Answers

  • Brainly User
2014-10-17T19:49:16+05:30
LHS = 1 + tan2AtanA 
       = 1 + 2tanA/1 - tan²A ×tanA
       = 1 - tan²A + 2tan²A / 1 - tan²A
       = 1 + tan²A / 1 - tan²A
       = sec2A
       =RHS
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