а) 2sin30°-cos60°=2×1/2-1/2= 1/2
б) √3sin60°tg30°=√3×√3/2 ×√3/3=√3/2
в) tg45°+sin30°=1+1/2=3/2
г) 4sin45°cos45°=2sin90°=2×1=2
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а) 2sin30°-cos60°=2×1/2-1/2= 1/2
б) √3sin60°tg30°=√3×√3/2 ×√3/3=√3/2
в) tg45°+sin30°=1+1/2=3/2
г) 4sin45°cos45°=2sin90°=2×1=2