26/05/2026
Prove that (√3 + 1) (3 – cot 30°) = tan360° – 2 sin 60°.
Solution:
LHS = (√3 + 1)(3 – cot 30°)
= (√3 + 1)(3 – √3)
= 3√3 – √3.√3 + 3 – √3
= 2√3 – 3 + 3
= 2√3
RHS = tan360° – 2 sin 60°
= (√3)3 – 2(√3/2)
= 3√3 – √3
= 2√3
Therefore, (√3 + 1) (3 – cot 30°) = tan360° – 2 sin 60°.
Hence proved.