Q. 1 A4.9( 26 Votes )

Evaluate

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Answer :

By trigonometric identity, we have


tan (90° - θ) = cot θ


Replace θ = 54°


tan (90° - 54°) = cot 54°


tan 36° = cot 54° [, 90° - 54° = 36°]


Now,



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