Chapter 12, Problem 5CRQ

a.

To determine

To fill: The blank in the statement “${\sin }^2\theta =\frac{1}{2}\left(1-\_\_\_\_\right)$”.

b.

To determine

To fill: The blank in the statement “$\sin \left(A+B\right)=\sin A\cos B\_\_\_\_\cos A\sin B$”.

c.

To determine

To fill: The blank in the statement “$\sin 2A=2\_\_\_\_\_$”.

d.

To determine

To fill: The blank in the statement “$\cos 2A={\cos }^{2}A-\_\_\_\_\_$”.