You are here:
Advanced Math/alg
Advertisement
Question
how do you make tan^2x/1+secx equal secx-1 ?
((tanx)^2)/(1 + secx) = secx - 1
((sinx/cosx)^2)/(1 + (1/cosx)) = secx - 1
((sinx/cosx)^2)/((cosx + 1)/cosx) = secx - 1
((sinx/cosx)^2)*(cosx/(cosx + 1)) = secx - 1
(cosx * sinx^2)/((cosx^2)(cosx + 1)) = secx - 1
(sinx^2)/(cosx(cosx + 1)) = secx - 1
(1 - cosx^2)/(cosx(cosx + 1)) = secx - 1
((1 + cosx)(1 - cosx))/(cosx(cosx + 1)) = secx - 1
(1 - cosx)/(cosx) = secx - 1
(1/cosx) - (cosx/cosx) = secx - 1
secx - 1 = secx - 1
This website should help explain somethings about Trig. www.math.com/tables/trig/identities.htm
Related Articles
Advanced Math
Answers by Expert:
Sherman D.
Expertise
I can answer questions dealing in mathematics of all kinds except for Physics and Calculus, but i can answer questions in Pre-Calculus and Chemistry. I can also answer questions in Recipes of all kinds. I can find games cheats/walkthroughs, but i can`t find a specific game online or offline. I can also do history and recipes for alcoholic beverages.
Experience
Mathematics, Recipes, History, and Games.
Education/Credentials
High School graduated. I graduated with honors, and i was in Beta Club for a year and a half.
Awards and Honors
Principle's list and A and B honor roll in high school only.
©2012 About.com, a part of The New York Times Company. All rights reserved.