题目内容
计算(或化简)下列各式:
(1)计算:(-1.8)0+(1.5)-2×(3
)
-(0.01)-0.5+log
(2)化简:(tan10°-
)•
(1)计算:(-1.8)0+(1.5)-2×(3
| 3 |
| 8 |
| 2 |
| 3 |
| 1 |
| 2 |
| 4 | 32 |
(2)化简:(tan10°-
| 3 |
| cos10° |
| sin50° |
(1)原式=1+(
)-2×[(
)3]
-10(-2)×(-0.5)+log
2
=1+(
)0-10-
=-9.25;
(2)原式=(
-
)•
=
×
=
=
=-2.
| 3 |
| 2 |
| 3 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
| 5 |
| 4 |
=1+(
| 3 |
| 2 |
| 5 |
| 4 |
=-9.25;
(2)原式=(
| sin10° |
| cos10° |
| 3 |
| cos10° |
| sin50° |
=
sin10°-
| ||
| cos10° |
| cos10° |
| sin50° |
=
2(
| ||||||
| sin50° |
=
| 2sin(-50°) |
| sin50° |
=-2.
练习册系列答案
相关题目