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You have to try resetting the system. First turn the breaker off for the condenser and wait about 20 seconds. After you turn it back on the system should reset.
REALLY> consider not a format and reload, that is tons of work, tons of update downloads, tons of program install, tons of user data install.....It is much easier to uninstall what you no longer want on your system.
You could also create a new user and log in that way....but man, not used icons, just throw them away.....
formating and reloading is used much less frequently now days.
If the distance of a person from a tower is 100 m and the angle subtended by the top of the tower with the ground is 30o, what is the height of the tower in meters? Solution:
AB = distance of the man from the tower = 100 m
BC = height of the tower = h (to be calculated)
The trigonometric function that uses AB and BC is tan A , where A = 30o.
So tan 30o = BC / AB = h / 100
Therefore height of the tower h = 100 tan 30o = (100) 1/√3 = 57.74 m.
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