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Mathematics 18 Online
OpenStudy (unbelievabledreams):

Solve the equation for an exact solution. I don't know how to solve it.

OpenStudy (anonymous):

what is 2arcsin(1/2)?

OpenStudy (unbelievabledreams):

pi / 3

OpenStudy (anonymous):

arccosx=pi/3+pi/2 by adding to both sides arccosx=5pi/6 by adding pi/3 + pi/2

OpenStudy (anonymous):

know how to get x?

OpenStudy (anonymous):

Hint: 5pi/6 is 150 degrees and it is at 2nd quadrant making it negative.

OpenStudy (unbelievabledreams):

Is it sqrt(11)/ 5pi ?

OpenStudy (anonymous):

No. arccosx=5pi/6 is cos(5pi/6)=? It should not have a pi value!

OpenStudy (unbelievabledreams):

- sqrt(3) / 2

OpenStudy (anonymous):

Yes, that is correct!

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