Q: in the diagram d is the diameter of the circle, a is the length of the arc ab and x is the length of nb which guo wanted to calculate.
A: In the diagram d is the diameter of the circle, a is the length of the arc AB and x is the length of NB which Guo wanted to calculate.

Q: localsec.dll file fixer - dll suite can perfectly fix localsec.dll missing in windows 7/8/xp/vista. besides, localsec.dll errors always come along with registry problem so that we highly recommend you install maxutilities for register issue.
A: localsec.dll file fixer - DLL Suite can perfectly fix localsec.dll missing in Windows 7/8/XP/Vista. Besides, localsec.dll errors always come along with Registry problem so that we highly recommend you install MaxUtilities for register issue.

Q: with this fiber is proposed a wide range of wigs, clip extension code and, in many versions and colors.
A: With this fiber is proposed a wide range of WIGS, CLIP EXTENSION CODE and, in many versions and colors.

Q: brfilt.sys device can't work/no sound: actually, in most cases device problem is because of .sys files.
A:
BrFilt.sys device can't work/No sound: Actually, in most cases device problem is because of .sys files.