Best answer gets to be !

complete the equation: 5 11/16 lb = _ oz.

a. 91 oz

b. 80 oz

c. 91/256 oz

d. 61 oz

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