TutorMe homepage

SIGN IN

Start Free Trial

Justin L.

Tutor for 6 years

Tutor Satisfaction Guarantee

Pre-Calculus

TutorMe

Question:

How do you find the domain of a square root function?

Justin L.

Answer:

To find the domain of a square root function, set everything inside the square root greater than or equal to 0 and solve for x. This is because we can never have a negative inside a square root, so we need to find what values of x result in 0 or larger inside.

Trigonometry

TutorMe

Question:

What quadrants is sine positive and negative? What about cosine? What about tangent?

Justin L.

Answer:

Sine is positive in quadrants I and II. This is because the y coordinates are positive in these quadrants. Cosine is positive in quadrants I and IV due to the x coordinates being positive in these quadrants. Tangent is positive in quadrant I and III. It is positive in quadrant I since both x and y coordinates are positive. It is positive in quadrant III because both x and y coordinates are negative and since tangent is y/x, the negatives cancel out.

Calculus

TutorMe

Question:

Write out the steps to find intervals of increase/decrease and local extrema.

Justin L.

Answer:

The first step would be to find critical points. To do this, find the derivative of the given function. Set it equal to 0 and solve for x. Any values you find AND any values that would make the first derivative undefined are critical points. To test for intervals of increase/decrease, set any critical points and vertical asypmtotes on a number line. Pick a "test point" from each interval. Substitute these test points into the first derivative. If a test point results in a positive result, then that entire interval is increasing. If a test point results in a negative result, then that entire interval is decreasing. A local minimum occurs where a function changes from decreasing to increasing. A local maximum occurs where a function changes from increasing to decreasing. A vertical asymptote is not a min/max, even if the function follows these patterns at a vertical asymptote.

Send a message explaining your

needs and Justin will reply soon.

needs and Justin will reply soon.

Contact Justin

Ready now? Request a lesson.

Start Session

FAQs

What is a lesson?

A lesson is virtual lesson space on our platform where you and a tutor can communicate.
You'll have the option to communicate using video/audio as well as text chat.
You can also upload documents, edit papers in real time and use our cutting-edge virtual whiteboard.

How do I begin a lesson?

If the tutor is currently online, you can click the "Start Session" button above.
If they are offline, you can always send them a message to schedule a lesson.

Who are TutorMe tutors?

Many of our tutors are current college students or recent graduates of top-tier universities
like MIT, Harvard and USC.
TutorMe has thousands of top-quality tutors available to work with you.

Made in California

© 2018 TutorMe.com, Inc.