Hi please help me with this question. I don't know how to do them. NOTE: for ID sinA*sinB there is a typo and its missing a - sign in between cos(A-B) and the other cos(A+B). It should be cos(A-B)-cos(A+B) insted

Trig Integrals with argument other than x (i.e. sin(nx)) - arguments differ Q.#5 Please evaluate the following integrals by simplest method. For differing arguments, either the modified Sum/Diff. IDs (below) or IBPs can be used as student prefers. Modified Sum/Diff. IDs sinA cosB = 1/2 [ sin(A - B) + sin(A + B) ] sinA sinB = 1/2 [ cos(A - B) cos(A + B) ] COSA cosB = /2 [ cos(A - B) + cos(A + B) ] Final Answer a) cos(4x) sin(6x) dx Final Answer b ) [sin.x sin(3x) da