2. Angle Sum and Difference Identities Practice

 $\sin A\cos\ B\ +\ \cos\ A\ \sin\ B$  

 $\sin\ A\ \cos\ B\ -\ \cos\ A\ \sin\ B$  

 $\cos\ A\ \cos\ B\ +\ \sin\ A\ \sin\ B$  

 $\cos\ A\ \cos\ B\ -\ \sin\ A\ \sin\ B$  

 $\tan\ A\ -\ \tan\ B$  

 $\frac{\tan\ A\ -\tan\ B}{1+\ \tan A\tan B}$  

 $\frac{\tan\ A\ +\tan\ B}{1-\ \tan A\tan B}$  

 $\frac{\sin\ A}{\cos\ B}$  

 $\sin\ 75^{o\ }$  

 $\sin\ 33^o\cos42^o+\cos33^o\sin42^o$  

 $\sin\ 33^o\cos42^o-\cos33^o\sin42^o$  

 $\cos33^o\cos42^o+\sin33^o\sin42^o$  

 $\cos\frac{\pi}{5}\cos\frac{\pi}{6}-\sin\frac{\pi}{5}\sin\frac{\pi}{6}\$  

 $\cos\frac{\pi}{5}\cos\frac{\pi}{6}+\sin\frac{\pi}{5}\sin\frac{\pi}{6}\$  

 $\cos\ \frac{2\pi}{11}$  

 $\cos\frac{\pi}{5}\sin\frac{\pi}{6}-\cos\frac{\pi}{5}\sin\frac{\pi}{6}\$  

 $75\degree-60\degree$  

 $115\degree-100\degree$  

 $60\degree-45\degree$  

 $85\degree-70\degree$  

 $80\degree-5\degree$  

 $40\degree+35\degree$  

 $100\degree-25\degree$  

 $30\degree+45\degree$  

 $185\degree-20\degree$  

 $45\degree+120\degree$  

 $35\degree+130\degree$  

 $180\degree-15\degree$  

 $120\degree-15\degree$  

 $180\degree-75\degree$  

 $55\degree+50\degree$  

 $60\degree+45\degree$  

 $200\degree+55\degree$  

 $220\degree+35\degree$  

 $300\degree-45\degree$  

 $360\degree-105\degree$  

0.2588

0.6503

 $\frac{\sqrt{6}-\sqrt{2}}{4}$  

 $\frac{\sqrt{2}-\sqrt{6}}{4}$