在△ABC中,角A,B,C的对边分别为a,b,c,且a=二分之根号三b,B=C 求:cosB得值.在△ABC中,角A,B,C的对边分别为a,b,c,且a=二分之根号三b,B=C求:cosB得值.设函数f(x)=sin(2x+B)求f(六分之π)得值
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/15 11:27:31
在△ABC中,角A,B,C的对边分别为a,b,c,且a=二分之根号三b,B=C 求:cosB得值.
在△ABC中,角A,B,C的对边分别为a,b,c,且a=二分之根号三b,B=C
求:cosB得值.设函数f(x)=sin(2x+B)求f(六分之π)得值
1.cosB=√3/8,2.(3+√3)/8
gfjakjfiddkllsaaaaaaaaaaaaaaaajgvvvvvvvvvvvvvvvvvvvvvvvvvvlsdaaaaaaaajrfffdlla;jcvjfklgjirjealejkrmeljmddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd...
全部展开
gfjakjfiddkllsaaaaaaaaaaaaaaaajgvvvvvvvvvvvvvvvvvvvvvvvvvvlsdaaaaaaaajrfffdlla;jcvjfklgjirjealejkrmeljmdddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd
收起
应该是....