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Topic:  Solving Trig. Equations 
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Subject:  Answer of your question 
Author:  harpreet singh 
Date:  Nov 16 2003 
I read your question. I think you are little confused about trignometrical
functions. your write that when tanX= 7/2 the X= 7/2/tan. but is not possible
that without angle tan does not exist. tan alone have no mean.
As I think
tanX= 7/2
X= tan^1(7/2) which value you can easily find our by trignometical table
or calculator. its value is 74.054. If you have any other problem. please mail
me . ok bye
 
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