Question

( pi=n pi )
( x=frac{n pi}{9}, n in 2 )
( 3 x=2 n+frac{5}{6} )
( x=frac{2 x y}{3} pm frac{57}{18} )
( x in[0, pi / 2] )
( x=n pi / 4 )
( n=0 cdot x=0 )
( n=1 quad x=pi / 4 )
( n=2 quad x=pi / 2 )
( sum_{t} 170(0, pi / 2) )

# F-4. If y 10 Na the number of solutions of the equation sin 7x + sin 4x + sin x = 0 is: 48) 5 (C) 6 (D) 4 (A) 3

Solution