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

24854 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

How do I simply differentiate and what does a differential mean?


Find dy/dx, given that y=(3x+1)/(2x+1)


How do you sketch the curve y=(x^2 - 4)(x+3), marking on turning points and values at which it crosses the x axis


If the functions f and g are defined: f: x--> x/5 + 4 g : x--> 30x + 10. what is x, if fg(x) = x. ?? What would fgf(x) = x^2 be??


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