I have a spinner that can be a b or c, a coin that has heads or tails and a pyramid dice that can be 1 to 4. How many possibilities are there and how many outcomes are there if I need a vowel a heads and an odd number (sorry if my phrasing is bad)

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