MathematicsEasy45×since 2004Q5660The maximum value of 3cosθ\thetaθ + 5sin (θ−π6)\left( {\theta - {\pi \over 6}} \right)(θ−6π) for any real value of θ\thetaθ is :A34\sqrt {34}34B31\sqrt {31}31C19\sqrt {19}19D792{{\sqrt {79} } \over 2}279Check answerSkip