3. Unit Circle

In Exercises 49–59, find the exact value of each expression. Do not use a calculator. sin (22𝜋/3)

Which set of ordered pairs represents angles in standard position that share the same reference angle?

Which of the following pairs of angles have the same reference angle?

Find exact values of the six trigonometric functions of each angle. Rationalize denominators when applicable. See Examples 2, 3, and 5. -2205°

Find exact values of the six trigonometric functions of each angle. Rationalize denominators when applicable. See Examples 2, 3, and 5. 495°

If $\theta$ is an angle in standard position such that $\theta >180°$ and $\theta <360°$, which equation can be used to determine the reference angle $r$?

In Exercises 35–60, find the reference angle for each angle. - 11𝜋 / 4

Find all values of θ, if θ is in the interval [0°, 360°) and has the given function value. cos θ = -½

In Exercises 49–59, find the exact value of each expression. Do not use a calculator. sec 7𝜋 / 4

Find the reference angle for 16𝜋 3

In Exercises 61–86, use reference angles to find the exact value of each expression. Do not use a calculator. sin(2𝜋/3)

Find exact values of the six trigonometric functions of each angle. Rationalize denominators when applicable. See Examples 2, 3, and 5. 1305°

Find the reference angle for each angle.

5π/4

In Exercises 49–59, find the exact value of each expression. Do not use a calculator. cos (11𝜋 / 6)