If ` sin 3 alpha =4 sin alpha sin (x+alpha ) sin(x-alpha ) `, then
A. `x=npi pm (pi)/(3), n in I `
B. `x=npi pm (pi)/(6), n in I `
C. `x=npi pm (pi)/(2) , n in I `
D. None of the above
A. `x=npi pm (pi)/(3), n in I `
B. `x=npi pm (pi)/(6), n in I `
C. `x=npi pm (pi)/(2) , n in I `
D. None of the above
Correct Answer – A