cos(a-b/2)=-3/5,sina(a/2-b)=5/13,且派>a>二分之派,0
问题描述:
cos(a-b/2)=-3/5,sina(a/2-b)=5/13,且派>a>二分之派,0
答
cos(a-b/2)=-3/5,sina(a/2-b)=5/13,且派>a>二分之派,0
cos(a-b/2)=-3/5,sina(a/2-b)=5/13,且派>a>二分之派,0
cos(a-b/2)=-3/5,sina(a/2-b)=5/13,且派>a>二分之派,0