tanα=m,则sin(α+3π)+cos(π+α)/sin(-α)-cos(π+α)等于?

来源:学生作业帮助网 编辑:作业帮 时间:2024/07/07 10:32:11
tanα=m,则sin(α+3π)+cos(π+α)/sin(-α)-cos(π+α)等于?
x)+I;6WiQS$~O/}ɮ>{"}J/;H`  @ ֆ C+VmS65RچPM HF 1_Y

tanα=m,则sin(α+3π)+cos(π+α)/sin(-α)-cos(π+α)等于?
tanα=m,则sin(α+3π)+cos(π+α)/sin(-α)-cos(π+α)等于?

tanα=m,则sin(α+3π)+cos(π+α)/sin(-α)-cos(π+α)等于?
sin(α+3π)+cos(π+α)/sin(-α)-cos(π+α)
=-sin(α)-cos(α) / -sin(α)+cos(α)
= -tan(α)-1 / -tan(α)+1
=(-m-1)/(-m+1)
=(m+1)/(m-1)