Question 29 * To evaluate the integral [sinecos ede by trigonometric transformation, we use the identity, A B sin0=1-cos0 cos0 = (1 + cos20) sin0 = (1 - cos20) 2 none of these sin28 2 Points (E) sin cose= 2 Question 30 If ff(x) dx = cotx + C, then f(x) is equal to A In|cscx B -2cscx In sinx none of these -2xcscx 2 Points