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3cos15°-sin15°的值等于22.
题目详情
3 |
2 |
2 |
3 |
2 |
2 |
3 |
2 |
2 |
2 |
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2 |
▼优质解答
答案和解析
cos15°-sin15°
=2(
cos15°-
sin15°)
=2sin(60°-15°)
=2sin45°=
,
故答案为:
.
3 3 3cos15°-sin15°
=2(
cos15°-
sin15°)
=2sin(60°-15°)
=2sin45°=
,
故答案为:
.
3 3 32 2 2cos15°-
sin15°)
=2sin(60°-15°)
=2sin45°=
,
故答案为:
.
1 1 12 2 2sin15°)
=2sin(60°-15°)
=2sin45°=
,
故答案为:
.
2 2 2,
故答案为:
.
2 2 2.
3 |
=2(
| ||
2 |
1 |
2 |
=2sin(60°-15°)
=2sin45°=
2 |
故答案为:
2 |
3 |
=2(
| ||
2 |
1 |
2 |
=2sin(60°-15°)
=2sin45°=
2 |
故答案为:
2 |
| ||
2 |
3 |
3 |
3 |
1 |
2 |
=2sin(60°-15°)
=2sin45°=
2 |
故答案为:
2 |
1 |
2 |
=2sin(60°-15°)
=2sin45°=
2 |
故答案为:
2 |
2 |
故答案为:
2 |
2 |
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