Help me with this math problem

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take