![$\frac {\cos^2 \left(\frac{\pi}{2}-x \right)+\sin(-x)-\sin^2 \left(\frac{\pi}{2}-x \right)+\cos \left(\frac{\pi}{2}-x \right)} {[\sin(\pi -x)+\cos(-x)] \cdot [\sin(2\pi +x)\cos(2\pi-x)]}$](/tpl/images/0744/1830/1ce9f.png)
![[\sin(\pi -x)+\cos(-x)] \cdot [\sin(2\pi +x)\cos(2\pi-x)]](/tpl/images/0744/1830/14e6d.png)
![[\sin(\pi -x)+\cos(-x)] \cdot [\sin(2\pi +x)\cos(2\pi-x)] \implies [\sin(x)+\cos(x)] \cdot [\sin(x)\cos(x)]](/tpl/images/0744/1830/60b6e.png)
![\implies [p+4] \cdot [p \cdot 4]=4p^2+16p](/tpl/images/0744/1830/e3819.png)
If sinx = p and cosx = 4, work out the following forms :
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