On the unit circle, where I <0<2, when is tan 0 undefined?
0=pi and 0=2pi
sin 0= cos 0
0=pi/2 and 0=3pi/2
sin 0=1/cos 0

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)

Solve for x and select the correct answer