I'm trying to solve this problem but I can't figure how. Can you help me?
$A=\frac{\sin \alpha+\cos(3\pi/2-\alpha)+\tan(5\pi+\alpha)}{\csc(2\pi-\alpha)+\sin(5\pi/2+\alpha)}$
If $\tan \alpha=-2/3$ and $\alpha \in$ IV quadrant, calculate the value of the expression.
Thanks.