0.38 written as a fraction

0.87 written as a fraction

-7 1/3 written as a fraction

0.6 written as a fraction is

0.135 written as a fraction is

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