Solve for X. I need the answer please help

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

Find the distance between the pair of points a(-1,8) and b(-8,4)

Ineed with the quizzes in apex mathematics ii