Ответ:
1) sin60°-2cos 30°+tg60°= √3/2 - 2 × √3/2 - √3= √3/2 - √3 - √3 = - 3√3/2≈-2,60
3)2sin 30° - 2cos30°.tg30°-cos0° sin90°= 2 × 1/2 - 2 × √3/2 × 1/√3 - 1 × 1 = 1 - 1 - 1=-1
2-ой пример там точно ctg 600?
1) √3/2 - 2 × √3/2 - √3= √3/2 - √3 - √3 = - 3√3/2≈-2,60
2) 3/4 + ctg(600) -√3
3) 2 × 1/2 - 2 × √3/2 × 1/√3 - 1 × 1 = 1 - 1 - 1=-1
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Ответ:
1) sin60°-2cos 30°+tg60°= √3/2 - 2 × √3/2 - √3= √3/2 - √3 - √3 = - 3√3/2≈-2,60
3)2sin 30° - 2cos30°.tg30°-cos0° sin90°= 2 × 1/2 - 2 × √3/2 × 1/√3 - 1 × 1 = 1 - 1 - 1=-1
2-ой пример там точно ctg 600?
1) √3/2 - 2 × √3/2 - √3= √3/2 - √3 - √3 = - 3√3/2≈-2,60
2) 3/4 + ctg(600) -√3
3) 2 × 1/2 - 2 × √3/2 × 1/√3 - 1 × 1 = 1 - 1 - 1=-1