已知tanθ=2\( ,​\)则\( \frac{\mathrm{sin}\left(\frac{\pi }{2}+\mathrm{\theta }\right)-cos(\pi -\mathrm{\theta })}{\mathrm{sin}\left(\frac{\pi }{2}-\mathrm{\theta }\right)-sin(\pi -\mathrm{\theta })}​\)=______.