JEE Main 2011Annual, Paper 1MathematicsEasyTrigonometry118× since 2002If A=sin2x+cos4x,A = {\sin ^2}x + {\cos ^4}x,A=sin2x+cos4x, then for all real xxx:AOption A. 1316≤A≤1{{13} \over {16}} \le A \le 11613≤A≤1BOption B. 1≤A≤21 \le A \le 21≤A≤2COption C. 34≤A≤1316{3 \over 4} \le A \le {{13} \over {16}}43≤A≤1613DOption D. 34≤A≤1{{3} \over {4}} \le A \le 143≤A≤1CheckSkip · show solution
