Jackie's dogs are play fighting with their toys. they have a total of 10 toys, 5 of which are red. jackie sees one of her dogs has a red toy in its mouth. if the other dog has a toy in its mouth as well, what is the chance that the toy is red?

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