You are here:

Advanced Math/One More ACT Q


Hey, It's Leo again; I was hoping I could ask you one more question to help me prep for my upcoming ACTs. Again, if you could show me your answer and the steps you used to get there, I would very much appreciate it.

I am asked to verify the identity of this problem:

[(cos(theta) * cot(theta)) / (csc(theta))] - 1 = -sin^(2)theta

Thank you for your time, Ms. Yang! Am very grateful for the assistance you provide.

Dear Leo,

This solution uses the quotient identities
  cotθ = cosθ/sinθ
  cscθ = 1/sinθ
then the Pythagorean identity
  sinēθ + cosēθ = 1


Advanced Math

All Answers

Answers by Expert:

Ask Experts


Janet Yang


I can answer questions in Algebra, Basic Math, Calculus, Differential Equations, Geometry, Number Theory, and Word Problems. I would not feel comfortable answering questions in Probability and Statistics or Topology because I have not studied these in depth.


I tutor students (fifth through twelfth grades) and am a Top Contributor on Yahoo!Answers with over 24,000 math solutions.

Co-author of An Outline of Scientific Writing: For Researchers With English as a Foreign Language

I have a Bachelor's degree in Applied Mathematics from the University of California at Berkeley.

Past/Present Clients
George White Elementary School. Homework Help program at the Ridgewood Public Library, Ridgewood, NJ. Individual students.

©2017 All rights reserved.

[an error occurred while processing this directive]