2. Use the guidelines to integrate a product of powers of sine and cosine functions and give the ezact value (no rounding up!) of the integral. Provide full details! [10] sin (x) cos'(r)dz. 3. Use the simple substitution u = 2 then: (3.a) use the guidelines to integrate a product of powers of tan and sec functions to find the integral. Provide full details! [10] tar'(2*) sec" (r)dr. (3.b) use the appropriate trigonometric substitution to find the integral. Provide full details! [10] 4. Use partial fractions to find the integral. Provide full details! [10] 1+r dr. 2r - 2 + r - 2r