Liz cut a rectangular piece of paper from a larger 10 inch by 12 inch piece of paper. The smaller piece was 2 inches wide and similar to the larger piece of paper. What was the height of the piece Liz cut from the paper?

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