plz give proper answer
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Answer:
= sin54/sin18 - cos54/cos18
= (sin54cos18 - cos54sin18)/sin18cos18
= (sin(54-18))/(2sin18cos18)/2
= (2sin36)/(sin36)
= 2
Answered by
2
Step-by-step explanation:
Sin54°/Sin18° - Cos54°/Cos18°
(Sin54° *Cos18° - Cos54° *Sin18°)/Sin18°Cos18°
Sin(54° - 18°) / Sin18° * Cos18°
Sin36° / Sin18° * Cos18°
2 * Sin36° / 2Sin18°Cos18°
2Sin36° / Sin(2*18°)
2Sin36° / Sin36°
= 2
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