Saturday, January 16, 2016

calculus - Evaluate limxtoinftycos(sqrtx+1)cos(sqrtx)


Evaluate limxcos(x+1)cos(x)



For this question I have tried using the squeeze theorem and some trigonometric manipulations such as using 2sinAsinB=cos(AB)cos(A+B)

. But they were of no use. I also tried using the substitutions like x=1/y
Hence as x , y0 but still no success.



I could've also tried using L'Hospital rule but I am not able to convert the function in appropriate indeterminate form. Any help would be greatly appreciated

No comments:

Post a Comment

analysis - Injection, making bijection

I have injection f:AB and I want to get bijection. Can I just resting codomain to f(A)? I know that every function i...