A photographer frames a carousel in her camera shot so that the line of sight forms tangent segments to the carousel. If she wants to capture an arc measure of 150 degrees in the photograph, what viewing angle should be used

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