Select the value that completes this expression for converting 10 yards to inches. 10 yards / 1 * ? * 12 inches / 1 foot a. 1 yd/ 36 in b. 3 feet/ 1 yard c. 360 in / 10 yards d. 120 feet / 10 in

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