∵tanα的周期为π,这里把α看成是一个锐角,
∴π-α>90°
∴tan(π-α)
猜你喜欢
- 1could I _____(that/if) Mr Brown comes from America?
- 25.4升=多少米的3次方
- 3读《匆匆》读后感
- 4在正等比数列an中,a1=1,an+1=2an+2^n,设bn=an/2^n-1证明bn是等差数列2求数列an的前n项和
- 5Are your borthers is students?Are your parent at home?Are those teachers?Are these onions?
- 6改错:People in the West celebrate Halloween on October 31st.
- 7用于纯电阻电路和非纯电阻电路的公式分别有哪些?
- 8like have try I a would to连词成句
- 9Luckily,he was not badly(bad) hurt and arrived at the church on time.
- 10已知a,b,c是不全相等的正数,求证:(ab+a+b+1)(ab+ac+bc+c2)>16abc.