Sin10x-cos3x=0 Тригонометрический уравнение
Sin10x-sin(π/2-3x)=0 2sin(13x/2-π/4)cos(7x/2+π/4)=0 sin(13x/2-π/4)=0⇒13x/2-π/4=πn⇒13x/2=π/4+πn⇒x=π/26+2πn/13 cos(7x/2+π/4)=0⇒7x/2+π/4=π/2+πn⇒7x/2=π/4+πn⇒x=π/14+2πn/7