Question

if x cosa=y cos(a+(2π/3))=z cos(a+(4π/3)), then find the value of xy+yz+zx​

Answer 1

Step-by-step explanation:

x cosa=y cos(a+(2π/3))=z cos(a+(4π/3)),x cosa=y cos(a+(2π/3))=z cos(a+(4π/3)),x cosa=y cos(a+(2π/3))=z cos(a+(4π/3)),x cosa=y cos(a+(2π/3))=z cos(a+(4π/3)),