“微信扫一扫”进入题库练习及模拟考试
已知\(\tan \alpha = 2\)，则\(\frac{{\sin (\frac{\pi }{2} - \alpha ) + 2\cos (\frac{\pi }{2} + \alpha )}}{{\sin (\pi + \alpha ) - \cos (\pi - \alpha )}}\)的值为( )
A.3
B.\(-3\)
C.\(\frac {5} {3}\)
D.\(-1\)
参考答案：A
进入考试题库
