4. Find the derivative of f(x) = 9sin-1 e2x + ln (tan-1 x) 5. Find the equation of the tangent line to the graph of f(x) -sec-(e*) at the point I2 equation ofthe tangent line te the graphofrx-see-v) at the point (ì) dh 6. Evaluate the following integral involving inverse trigonometric functions: | 49x2-25