Enable contrast version

# Tutor profile: Stone D.

Inactive
Stone D.
Engineering Student at the University of South Carolina
Tutor Satisfaction Guarantee

## Questions

### Subject:Pre-Calculus

TutorMe
Question:

What is sin^2 + cos^2?

Inactive
Stone D.

The answer to this question is 1. The reason the answer is 1 is because sin^2 + cos^2 =1 is a trig identity that makes problems in higher level calculus problems easier to solve.

### Subject:Mechanical Engineering

TutorMe
Question:

Why does the principal element have no shear stress?

Inactive
Stone D.

The principal element of a material has no shear stress as it the ideal plain inside a material. This plain is a certain angle, theta, away from the plane that is in a "planar" state of stress. Since this plane has no shear stress it allows us to draw a 3-d mohr's circle and create the entire principle element.

### Subject:Calculus

TutorMe
Question:

What is the derivative of x^2 + 2x?

Inactive
Stone D.

This problem revolves around the power rule of derivatives. You can use the power rule for both 'x' variables in the problem. The use of the rule leads to x^2 becoming 2x. The 2x then because of the 'x' that is raised to the power of 1 just becomes the constant 2. Your final answer would then be 2x+2.

## Contact tutor

Send a message explaining your
needs and Stone will reply soon.
Contact Stone