Consider the functions in the attached image AND compute the matrix of partial derivatives of D(g ◌ f ).

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

The sum of two numbers is 86, and their difference is 20. find the two numbers

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?