# Math Help - Solution of equation

1. ## Solution of equation

I was just wondering how could one find the solution of equations involving trigonometric and polynomial expressions.
For example, how could we solve $x - cosx=0$?
Keep Smiling
Malay

2. Originally Posted by malaygoel
I was just wondering how could one find the solution of equations involving trigonometric and polynomial expressions.
For example, how could we solve $x - cosx=0$?
Keep Smiling
Malay
I can proof that a unique solution exists.

You can approximate solutios with "Newton-Raphson Alogorthm".

I would not be supprised that the solution is transcendental

3. Originally Posted by malaygoel
I was just wondering how could one find the solution of equations involving trigonometric and polynomial expressions.
For example, how could we solve $x - cosx=0$?
Keep Smiling
Malay
Most solutions to mixed algebraic/tanscendetal equations are do
not have simple closed forms in terms of the usual elementary functions
(no don't ask me to prove it). So do however have such solutions, see