问题
填空题
在△ABC中,∠C=90°,∠B=2∠A,则tanA=______.
答案
∵∠C=90°,
∴∠A+∠B=90°,
∵∠B=2∠A,
∴∠A=30°,
∴tanA=
.3 3
故答案为:
.3 3
在△ABC中,∠C=90°,∠B=2∠A,则tanA=______.
∵∠C=90°,
∴∠A+∠B=90°,
∵∠B=2∠A,
∴∠A=30°,
∴tanA=
.3 3
故答案为:
.3 3
根据提示选词填空。 | |
2. What's she ___________ ? 3. Mike is very ___________ (聪明的). 4. ___________ is your English teacher? 5. She is a ___________ student. 6. She's our ___________. 7. Her class is very ___________ (有趣的). |