The angle C of triangle ABC is always right angle. a) If the sum of CA and CB is 6cm , find the maximum area of triangle b) If, on the other hand, the hypotenuse is to be kept equal to 4cm and the sides CA, CB allowed varying, finding the maximum area of the triangle.
i have done part a but i am stuck on part b
please help me with part b. I have attached my workings so far