Mechanical Engineering actual practice

A friend of mine wants to enroll into Mechanical engineering but he has horrible problems with calculus. In general he doesnt like math and Im trying to help but Ive never been informed about this.
How much Math is used in the actual field once you've graduated?
I can use any information but if theres an engineer reading this please try to be as detailed as you can!

I'm a mechanical engineer and you will use all the math that they teach you to solve complex engineering problems while you are in school. With the exception of a few analysis jobs you will not use complex math on a day to day basis. What you will do is apply those engineering theories that you learned in the engineering classes without actually doing the analysis. Understanding the true cause of a problem is what engineering is about and then coming up with the correct solution.

The math IS hard to learn and you WILL use is for the rest of your college classes. The good thing is that they teach you easier methods, let you use computers, and over time the math becomes routine.

It was essential for me to learn the math to get through school, BS and MS in Mechanical Engineering. Many engineering concepts are not comprehensible without the math.

Putting that aside, I have solved one differential equation as a working engineer. It had constant coefficients. I had two situations where I had to do calculus. That is in 30+ years. I use algebra, geometry, and trig virtually every day of my life. Understanding the math behind the engineering theories has allowed me to understand those theories better and apply them successfully to real situations. The real situations never tell you what theory to apply. You have to figure that out by yourself, that's what makes you an engineer.

Math is definitely used a lot in all fields of engineering. Even after school, a lot of math is used and you have to know how to perform some of the simpler methods. The good news is that with practice you can become very good at math. Some people have certain blocks that make it harder to learn certain fields of study. This is the time to look into some alternative learning methods for your friend. I do not know if your school system allows for people to be tested for certain learning disabilities but they do in Canada, at least in the community college system and by extension, I assume unversity as well. I do not know about high school but it is quite possible.