Turn on thread page Beta
    • Thread Starter

    solve for 0<x<180
    5cos2x - 2sin2x = 0
    to 1dp
    i have no idea how to do these questions please help if you can

    Divide everything by cos2x. Then rearrange to get tan2x on its own. Then inverse tan to find 2x. Divide by 2 to get one value. Add 180 to the 2x value and divide by two to get the other value
Submit reply
Turn on thread page Beta
Updated: February 6, 2017
Do you think parents should charge rent?
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.