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

24118 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Find the gradient of the tangent and the normal to the curve f(x)= 4x^3 - 7x - 10 at the point (2, 8)


differentiate 4x^3 + 3x^2 -5x +1


The point P (4, –1) lies on the curve C with equation y = f( x ), x > 0, and f '(x) =x/2 - 6/√x + 3. Find the equation of the tangent to C at the point P , giving your answer in the form y = mx + c. Find f(x)


differentiate parametrically y=3t+4 and x=2t^2 +3t-5


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