题目内容
求值:sin50°(1+
tan10°)=______.
| 3 |
原式=sin50°?
=cos40°
=
=
=1
故答案为:1
cos10°+
| ||
| cos10° |
| 2sin40° |
| cos10° |
| sin80° |
| cos10° |
| sin10° |
| cos10° |
故答案为:1
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题目内容
| 3 |
cos10°+
| ||
| cos10° |
| 2sin40° |
| cos10° |
| sin80° |
| cos10° |
| sin10° |
| cos10° |