若α是三角形的一个内角,且sinα=,则α等于(    )A.30°      

若α是三角形的一个内角,且sinα=,则α等于(    )

A.30°                                   B.30°或150°

C.60°                                   D.60°或120°

答案

B

相关题目

WHEN an NBA player is young he thinks he can win the championship by himself. It
WHEN an NBA player is young he thinks he can win the championship by himself. It is only later when he has aged and been through many battles that he learns an important lesson: there is no I in team.
________,his bookishness,curiously little is known about the world view of
________,his bookishness,curiously little is known about the world view of Gordon Brown,the first British Prime Minister said to be a real intellectual in decades. A.Though        
 —Can you speed it up a little? I’ll be late for my flight. —. I’m ta
 —Can you speed it up a little? I’ll be late for my flight. —. I’m taking a short cut. We’ll make it on time. A. OK, I’ll speed it up            B. Never mind C. Take it ea
中国古代文献记载了丰富的化学知识。 (1)黑火药是我国的“
中国古代文献记载了丰富的化学知识。 (1)黑火药是我国的“四大发明”之一,爆炸时发生的主要反应如下,请完成配平(在方框内配上化学计量数,化学计量
我们不能随地吐痰是因为痰中含有大量的病菌。痰生成的部
我们不能随地吐痰是因为痰中含有大量的病菌。痰生成的部位是(   )        A.鼻腔黏膜            B.喉腔侧壁                C.
 Not only the students but also the teacher ___ enjoying the film at 9pm yeste
 Not only the students but also the teacher ___ enjoying the film at 9pm yesterday.    A has been         B was               C are                    D i
函数          的大致图象是(    )。 A.        
函数          的大致图象是(    )。 A.             B.              C.             D.
如图,直线a∥b,直线c与直线a、b分别相交于A、B两点,若∠1=6
如图,直线a∥b,直线c与直线a、b分别相交于A、B两点,若∠1=60°则∠2=       .

最新题目