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to The scale on a map is 1:500000
Two towns are 7cm apart on the map.
Work out the actual distance between the towns.
Give your answer in kilometres.

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