y=4cosx/3,0
问题描述:
y=4cosx/3,0
答
y=4cosx/3
x/3=arccos(y/4)
x=3arccos(y/4)
反函数为:y=3arccos(x/4)定义域是多少??谢谢!定义域就是原来函数的值域。y=4cosx/3;0