Which ratio in the form a: b is equivalent to the ratios in the table?

He concluded that a heavier object dropped from the same height as a lighter object will land

What is the product? a-3/15a × 5/a-3

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