Question

( 18 cos x+9 sin x )
en eamparing with beos ( x+a sin x )
( therefore a=9 )

# If the expression + sin(32x + 1) - 18 cos(19x ) + cos(56x + x) - 9 sin(x + 177) is expressed in the form of a sinx + b cosx, then (a + b) is equal to (A) 17 (B) 27 (C) 13 (D) 23

Solution