Question 3 1 pts We want to compute the integral / tan xdx. If we use integration by parts, with u(x) =tan la and v'(@)=1, what do we get? O tan x - x . tan edx O 1 - 1 + x2 O 1 . tan * - O a . tan x - - 1+a2Question 4 1 pts Use integration by parts. with 1.51:3] = a: and 11' (so) =sin(23} , calculate the area of the shaded region in the following diagram. Write your answer as a decimal. rounded to two decimal places. y=x-ein[2x)