What is the difference in the place value between the 2 in 324 and the 2 in 0.324?

Thee blue triangle has rotated from quadrant i to quadrant iii about the origin. describe the effects of the rotation on the coordinates of the blue triangle.

Find the exact value of cos(arcsin( one fourth for full credit, explain your reasoning. (2 points)

Which graph or graphs appear to show a sinusoid? < me asap !