a) 3 sin 60°- ctg 45°+ 3 tg 30°=
b) 2 sin 30°- 3 cos 60° - 4 tg 45°=
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a) 3 sin 60°- ctg 45°+ 3 tg 30°=3*√3/2 - 1 + 3*√3/3 = 9√3 - 6 + 6√3 =
= 15√3 - 6 = 3(5√3 - 2)
b) 2 sin 30°- 3 cos 60° - 4 tg 45°= 2*½ - 3*½ - 4 = 1 - 1,5 - 4 = - 4,5
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a) 3 sin 60°- ctg 45°+ 3 tg 30°=3*√3/2 - 1 + 3*√3/3 = 9√3 - 6 + 6√3 =
= 15√3 - 6 = 3(5√3 - 2)
b) 2 sin 30°- 3 cos 60° - 4 tg 45°= 2*½ - 3*½ - 4 = 1 - 1,5 - 4 = - 4,5