Question 1172356
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It is the same as to ask


            at what condition  2  is  3 ?



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<U>Comment from student</U> : &nbsp;&nbsp;Sorry I think I did not put question in right way. Question is following: 


&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;At what point graph of inverse of Cosine of x and Inverse of Sine of x are same? [Hint: Sin(pi/4) = Cos(pi/4)





<U>My response</U> :  &nbsp;&nbsp;Your comment is perfectly right / correct.


But now, having the &nbsp;HINT, &nbsp;you just know the answer, &nbsp;as I see from your comment,

so, &nbsp;the only thing that remains for me, &nbsp;is to be glad seeing your progress &nbsp;(!)