The terminal side of an angle $\beta$ is located in Quadrant IV and
 $0\degree<\beta<360\degree$  
  $\tan\left(\frac{\beta}{2}\right)$  must be:

To find an exact value for the expression: $\sin\left(67.5\degree\right)$  , you should use 

Choose all appropriate answers:

Using your calculator to double check that your exact value is correct is

In the expression: $\frac{3-\sin x}{3+\cos x}$  
the 3s can be cancelled from the numerator and denominator.

Which angle measure can't be evaluated using a trig function with the sum/difference formula?

 $\sqrt{2}+\sqrt{3}$  is equal to

The terminal side of an angle $\alpha$ is located in Quadrant III. 

If  $0\degree<\alpha<360\degree$  

then  $\cos\left(\frac{\alpha}{2}\right)$  must be:

 Choose all correct answers: If the terminal side of an angle $\theta$ is located in Quadrant I, then  $\sin\left(\frac{\theta}{2}\right)$  could be:

Rewrite the angle $\frac{5\pi}{8}$  as if you were going to use the half angle formula.