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

Please select the best answer from the choices provided

A
B
C
D