Calculus/math

Advertisement


Question
sir i asked my question
sir, plz tell me how   
if f(x)=cos3x ...how it is neither increasing nor decreasing on(0,pie/2)



sirrr ..plz   send answer directly to my email ...i m nt able to click on your links ...so plz

Answer
I'm not sure how to reply directly to your email, but here it is in AllExperts.

If the function is f(x) = cos(3x), and the interval is (0,pi/2),
let's look at the derivative.

It can be seen that f'(x) = -3*sin(3x). Since sin(0) = 0 and sin(3x) is positive on (p,pi/2),
the function is increasing over the whole interview with an inflection point at x=0.

Calculus

All Answers


Answers by Expert:


Ask Experts

Volunteer


Scotto

Expertise

Any kind of calculus question you want. I also have answered some questions in Physics (mass, momentum, falling bodies), Chemistry (charge, reactions, symbols, molecules), and Biology (reproduction, insusion of chemicals into bloodstream).

Experience

Experience in the area: I have tutored students in all areas of mathematics since 1980. Education/Credentials: BSand MS in Mathematics from Oregon State University, where I completed sophomore course in Physics and Chemistry. I received both degrees with high honors. Awards and Honors: I have passed Actuarial tests 100, 110, and 135.

Publications
Maybe not a publication, but I have respond to well oveer 8,500 questions on the PC. Well over 2,000 of them have been in calculus.

Education/Credentials
I aquired well over 40 hours of upper division courses. This was well over the number that were required. I graduated with honors in both my BS and MS degree from Oregon State University. I was allowed to jump into a few courses at college a year early.

Awards and Honors
I have been nominated as the expert of the month several times. All of my scores right now are at least a 9.8 average (out of 10).

Past/Present Clients
My past clients have been students at OSU, students at the college in South Seattle, referals from a company, friends and aquantenances, people from my church, and people like you from all over the world.

©2016 About.com. All rights reserved.