1. The problem asks which of the given trigonometric values equal 0. 2. Recall the basic trigonometric values for angles 0° and 90°: - $\sin 0^\circ = 0$ - $\cos 0^\circ = 1$ - $\tan 0^\circ = 0$ - $\sin 90^\circ = 1$ - $\cos 90^\circ = 0$ - $\tan 90^\circ$ is undefined (tends to infinity). 3. Evaluate each option: - A. $\sin 0^\circ = 0$ (True) - B. $\cos 0^\circ = 1$ (False) - C. $\tan 0^\circ = 0$ (True) - D. $\sin 90^\circ = 1$ (False) - E. $\cos 90^\circ = 0$ (True) - F. $\tan 90^\circ$ is undefined (False) 4. Therefore, the options with value 0 are A, C, and E.