2cos² 34° - 1 expressed as a single trigonometric ratio? (With explanation of steps please)

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.

Select a graph that have an equation with a < 0

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq