Select all angle measures for which sin(theta)=-root 2/2​

Which of the following is missing in the explicit formula for the compound interest geometric sequence below?

The coordinates of vortex a’ are (8,4) (-4,2) (4,-,4) the coordinates of vortex b’ are (6,6)(12,-,12)(12,12) the coordinates of vortex c’ are(-2,,12)(4,12)(12,-4)

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?