y=tan(2x-π/4),x∈[0,π/3]的值域

问题描述:

y=tan(2x-π/4),x∈[0,π/3]的值域
要详细的过程.在线等.
拜托了.
谢谢!

tan(2x-π/4),x∈[0,π/3]
(2x-π/4)∈[-π/4,5π/12]
对于tany,在y∈[-π/4,5π/12]时,是连续的、且是单调的.
tan(-π/4)=-1,tan(5π/12)=2+√3
即:tan(2x-π/4)∈[-1,2+√3]