You are here:

# Calculus/trigonometric functions

Advertisement

Question
Could you help me with this problem? I'd really appreciate it.

Thank you for any help!

Answer
Make a right triangle with an angle A.  Label the far side from the angle as B and the right angle as C.  Now label the sides opposite each angle in the same lower case letter.  This makes the far side from that angle as a, the near side b, and the hypotenuse as c.

Given this, sin(A) = a/c, cos(A) = b/c, tan(A) = a/b,
ctn(B) = 1/tan(A) = b/a, sec(A) = 1/cos(A) = c/b, and csc(A) = 1/sin(A) = c/a.

If you take aē+bē=cē, it can be transformed by using proper divisions
Note that sinē(x) + cosē(x) = 1, 1 + tanē(x) = secē(x), and 1 + ctnē(x) = cscē(x).

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.

©2017 About.com. All rights reserved.

Browse Answers: