Turn on thread page Beta
    • Thread Starter

    So I have SecxTanx (multiplide together) - Secx^2 all divided by SecxTanx + Secx^2

    I need to get this in the form Sinx -1 divided by Sin x + 1

    I kinda am struggling, Im getting it to Sinx^2 on one side of the equation, but on the other side I cant rearrange it.

     \frac{sec(x)*tan(x) - sec^2(x)}{sec(x)*tan(x) + sec^2(x)}

    (Cancel sec(x) from top and bottom-formally factorise it and cancel)

      = \frac{tan(x) - sec(x)}{tan(x) + sec(x)}

    (tan(x)=sin(x)/cos(x) and sec(x)=1/cos(x)) (Cancel cos(x))

     = \frac{\frac{sin(x)-1}{cos(x)}}{\frac{sin(x)+1}{cos(  x)}} = \frac{sin(x)-1}{sin(x)+1}
Submit reply
Turn on thread page Beta
Updated: April 29, 2016

University open days

  1. University of Edinburgh
    All Departments Undergraduate
    Sat, 22 Sep '18
  2. University of Exeter
    Undergraduate Open Days - Penryn Campus Undergraduate
    Sat, 22 Sep '18
  3. Loughborough University
    General Open Day Undergraduate
    Sat, 22 Sep '18
Which accompaniment is best?
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here


How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.