Aspinner is divided into 10 equal segments. the segments are labeled with the letters a, b, e, i, l, m, o, s, t, u. match each compound event with its probability.

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