/(k-s(k+andk)2f(x)-(g+adk >-agkk Mlld k 2 Mdk kwk 2M lgkfldkI COS 2M( ) ( ) ( ) ( ) k k k k k k dk f x − f x + d  f x − f x + 2 2 2 1 k k T  −gk d −  M d ( ) 2 2 2 1 k k T k M d g d = ( ) 2 2 2 2 2 1 k k k T k k g d g d g M = gk k M  2 2 cos 2 1 =