化简cos(a-3π)/sin(a+5π)*sin(a-2π)化简cos(a-3π)/sin(a+5π)*sin(a-2π)*cos(2π-a)
问题描述:
化简cos(a-3π)/sin(a+5π)*sin(a-2π)
化简cos(a-3π)/sin(a+5π)*sin(a-2π)*cos(2π-a)
答
化简cos(a-3π)/sin(a+5π)*sin(a-2π)
化简cos(a-3π)/sin(a+5π)*sin(a-2π)*cos(2π-a)