Math Chapter Wise question with answer

Q01 If 4 4 a cos isin, 3 3 π = + = + then the value of 3n 1 a 2 + is English · LT 2018 Q02 If x+iy= (cosθ–isinθ)2 then value of x2 +y2 = English · PGT 2011 Q03 If { { { } } 1, ∈ − n N then the value of sin n 1 cos. 1 cos − + + + − + + + − + + + − + + + − n n i sin i n n n π... English · PGT 2013 Q04 If xn = cos (π/3n + i sin (π/3n), then the value of x1. x2. x3…..xn…..∞ ∞ ∞ is? English · PGT 2004 Q05 If x = cosα + isinα and y = cosβ + isinβ then the value of x – y x + y will be: English · TGT 2013 Q06 If sinx icos2x + + and cosx isin2x − − are conjugate to each other, then: English · KVS PGT 23-12-2018