A survey was taken of chilren between the ages of 3 and 7. Let A be the event that the person has 2 sibilings. and let B be the event that the person does not have a pet. which statement is true about whether A and B are independent events?

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