$\arctan\left(\cos0\right)=$  

(a)  

 $\sin^{-1}\left(\tan\left(\frac{-\pi}{4}\right)\right)=$  

(a)  

 $\arcsin\left(\cos\frac{5\pi}{6}\right)=$  

(a)  

 $\cos^{-1}\left(\tan\frac{\pi}{4}\right)=$  

(a)  

 $\arctan\left(\sin\left(-\frac{pi}{2}\right)\right)=$  

(a)  

 $\cos\left(\sin^{-1}\left(\frac{1}{2}\right)\right)=$  
*please use sqrt for  $\sqrt{ }$  

(a)  

  $\sin\left(\arctan1\right)$  
*please use sqrt for  $\sqrt{ }$  

(a)  

 $\sin\left(\arccos0\right)=$  

(a)  

 $\cos\left(\tan^{-1}\sqrt{3}\right)=$  

(a)