Question

5sin (11пи) / 12  *  cos 11пи / 12

Answer 1

$5sin frac{11 pi }{12} *cos frac{11 pi }{12} =2,5(2sin frac{11 pi }{12} *cos frac{11 pi }{12}) =2,5ssin frac{11 pi }{6}= \ 2,5*(-0,5)=-1,25$