Jane and Jerry were counting the months until their birthdays. Jane said 3/4 of the year would
pass before it was her birthday. Jerry said he only
needed to wait 1/3 of the year. How much longer
did Jane have to wait than Jerry?

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