If \cos{60^\circ}=\cos{45^\circ}\cos{\theta} with 0^\circ\le\theta\le90^\circ, then \theta equals
Answer Choices
A. 0^\circ
B. 15^\circ
C. 30^\circ
D. 45^\circ
E. 60^\circ
If \cos{60^\circ}=\cos{45^\circ}\cos{\theta} with 0^\circ\le\theta\le90^\circ, then \theta equals
Answer Choices
A. 0^\circ
B. 15^\circ
C. 30^\circ
D. 45^\circ
E. 60^\circ