已知tanα=2,求值 {4sin α( π- α)+3cos( π+α )}/ {4cos(3π/2 - α )-3sin(π/2 + α)}
问题描述:
已知tanα=2,求值 {4sin α( π- α)+3cos( π+α )}/ {4cos(3π/2 - α )-3sin(π/2 + α)}
答
已知tanα=2,求值 {4sin α( π- α)+3cos( π+α )}/ {4cos(3π/2 - α )-3sin(π/2 + α)}