Algebraically determine the exact value with a rational denominator of the trig expression: tan 12

List all the possible rational roots of x* - 2r – 6x² + 22x – 15 =0. PENCIL THIN BLACK all possible rational roots:

Simplify expressions of the form √a2.

Find all possible values of y if (-1, y) lies on the unit circle. Give your answer in the form of a comma-separated list if needed. Express numbers in exact form. Use symbolic notation and √3 fractions where needed. This means that your answer should be something like, instead of 0.866, – 0.866. 2 y = -