BackAn equation of the terminal side of an angle θ in standard position is given with a restriction on x. Sketch the least positive such angle θ , and find the values of the six trigonometric functions of θ . See Example 3. x = 0 , y ≥ 0
Find the indicated function value. If it is undefined, say so. See Example 4. sin 90°
Find the indicated function value. If it is undefined, say so. See Example 4. sec 180°
Find the indicated function value. If it is undefined, say so. See Example 4. sin(―270°)
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. tan 360° + 4 sin 180° + 5(cos 180°)²
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
If n is an integer, n • 180° represents an integer multiple of 180°, (2n + 1) • 90° represents an odd integer multiple of 90° , and so on. Determine whether each expression is equal to 0, 1, or ―1, or is undefined. sin[n • 180°]
If n is an integer, n • 180° represents an integer multiple of 180°, (2n + 1) • 90° represents an odd integer multiple of 90° , and so on. Determine whether each expression is equal to 0, 1, or ―1, or is undefined. sin[270° + n • 360°]