Solve and answer the question

y. 1- Solve the differential equation dx cos( x + y) 2* Solve the following differential equation, satisfying initial condition: nyj: = 1+ yz, y(1)=2. 3- Evaluate 1-01 SSE/rm. 4 Find the area of the region bounded by the graphs of u+vi1 = 6 and u+2v -3=0, and then this area is revolved about the x=2 find the volume produce? 5- The excess temperature 6 of a motor under load over that of its surroundings at time t is given by % =10 - k6, Where k is constant. If 6:50 when t=10, find 6' at any other time. 6- Integrate the following I xzcosh (x)dx