sinx - 4cosx=4m-6/4-m,求m取值范围
问题描述:
sinx - 4cosx=4m-6/4-m,求m取值范围
答
sinx-4cosx=√17sin(x+α)∈[-√17,√17]
(4m-6)/(4-m)=-4+10/(4-m)
m∈[44-10√17,44+10√17]