PLEASE HELP! I have no clue how to do this!

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

Is the point (0, 8) on the x-axis or y-axis? how do you know?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b