Question

(3cosx+1)/2+(5cosx-1)/3=1.75

Answer 1

$frac{3cos x+1}2+frac{5cos x-1}3=1,75;;times6\ 9cos x+3+10cos x-2=10,5\ 19cos x=9,5\ cos x=frac12\ x=frac{pi}3+2pi n,;ninmathbb{Z}$