solve sin(2x)=0.5. between 0<x<2pi


1)Take the inverse sin to take x from the sin(2x):

2x=arcsin(0.5).

2)Evaluate arcsin(0.5) to get pi/6:

so 2x= pi/6

3)Dividing by 2 to simplify we get 

x=pi/12.

4)To find the second solution we note that (pi/2)-(pi/12) =(5pi/12) is also a solution. 

So x= (5pi/12)

5)Sin(2x) has a period of pi. So to find the rest of the solutions we add pi to our previous solutions. 

So now x=pi/12, 5pi/12, 13pi/12 , 17pi/12

YZ
Answered by Yinglan Z. Maths tutor

24111 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

How do you find the gradient of a line at a certain point when f(x) is in the form of a fraction, where both the numerator and denominator are functions of x?


How do I find the distance between two point in the plane?


∫ x^3 *ln(2x) (from 2->1) can be written in the form pln 2 + q, where p and q are rational numbers. Find p and q.


How can I recognise when to use a particular method for finding an integral?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning