1) 10sinAcosA = 2) sin3Acos3A = 3) 2cos^2(pi/8)-1 = 4) 20sin^2(4A)cos^2(4A) =

Question

1) 10sinAcosA = 2) sin3Acos3A = 3) 2cos^2(pi/8)-1 = 4) 20sin^2(4A)cos^2(4A) =

Answer 1

...........................

---