Once again, the last statement: وَتَوَكَّلْ عَلَى اللَّـهِ ۚ وَكَفَىٰ بِاللَّـهِ وَكِيلًا (And place your trust in Allah and Allah is enough as a guardian- 3) is also a complement of the same order. Here it is being said: As for your approach, just pay no heed to what they say and, in order to succeed in your objective, you should trust no one but Allah for He, in Himself and by Himself, is the ultimate doer, maker and fixer of all matters and things. With Him there, you do not need to acquiesce in the opinion of anyone.

Ruling

The cited verse proves that, in religious matters, even consulting with disbelievers is not permissible. In other matters relating to technical or functional experience, there is no harm in doing so. And Allah knows best.