Find the indicated function value. If it is undefined, say so. See Example 4. tan 450°

Find the indicated function value. If it is undefined, say so. See Example 4. cos 1800°

Find the indicated function value. If it is undefined, say so. See Example 4. sec 1800°

Use trigonometric function values of quadrantal angles to evaluate each expression. 3 sec 180° ― 5 tan 360°

Use trigonometric function values of quadrantal angles to evaluate each expression. (sin 180°)² + (cos 180°)²

Use trigonometric function values of quadrantal angles to evaluate each expression. (sec 180°)² ― 3 (sin 360°)² + cos 180°

Use trigonometric function values of quadrantal angles to evaluate each expression. ―3(sin 90°)⁴ + 4(cos 180°)³

Use trigonometric function values of quadrantal angles to evaluate each expression. [cos(―180°)]² + [sin(― 180°)]²