Question

2 tan²45°+ cos²30°-sin²60′​

Answer 1

tan45∘=1,

cos30 ∘ = √3/2

,sin60 ∘= √3/2

∴2tan^2 45∘+cos^2 30∘ −sin 60∘

= 2 x 1^2 + (√3/2)^2 - (√3/2)^2

= 2 x( 1 ) = 2

therefore.. 2tan square 45 + cos square 30 - sin 60 = 2