Which set of values are equivalent. , 3/10, 30%, 0.3 1.14, 2/5 , 4% 50%,1/2 , 0.05 0.625, 5/8, 6.25%

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