Question

Solve the equation: 2 sin 3x + radical 3= 0
Over 0 12 years ago

Answer 1

Given 2 sin 3x + radical 3= 0
or 2 sin 3x = - radical 3
or sin 3x = - radical 3 /2 ....(1)

We know that sin (pi/3) = radical 3 /2
But our result is in minus. For that move sine function into 3rd quadrant (because in 3rd quadrant sine function is negative.

sin (pi + pi/3) = - radical 3 /2, Put this result in eqaution (1)

(1) => sin 3x = sin (pi + pi/3) = sin(4pi/3)
or 3x = 4pi/3
or x = 4pi/9


Maths Question Paper for Class 4 CBSE
- http://education-help-online.blogspot.in/2014/08/maths-question-paper-for-class-4-cbse.html