x, y and z are unequal positive numbers. Which of the following relations is possible? (A) cosθ = (x²+y²+z²)/(xy+yz+zx)(B) secθ = (x²+y²+z²)/(xy+yz+zx)(C) sinθ = (x²+y²+z²)/(xy+yz+zx)(D) cosecθ = (xy+yz+zx)/(x²+y²+z²).

Sayantan Garai , 5 Years ago

Grade 10