Simplify integrand: Step 1: Simplify the integrand.We start by recognizing that cos2(x)1 is sec2(x) and sin2(x)1 is csc2(x). So, the integral becomes:∫(sec2(x)−csc2(x))dx
Separate the integral: Step 2: Separate the integral.The integral of sec2(x) is tan(x), and the integral of csc2(x) is −cot(x). Therefore:∫sec2(x)dx−∫csc2(x)dx=tan(x)+cot(x)
Evaluate limits: Step 3: Evaluate from 6π to 3π.Plug in the limits of integration:[tan(x)+cot(x)] evaluated from 6π to 3π= [tan(3π)+cot(3π)]−[tan(6π)+cot(6π)]