Question

Is cos theta=x+y/x-y possible if,y£R and 0<theta<90°.

Answer 1

Step-by-step explanation:

Solution

If 0<theta<90°

Then, 0<Cos theta <1

So, 0<x+y/x-y < 1

So in case 1st

0<x+y/x-y

For define the equation x-y not equal to 0.

So, x not equal to y.

Hence, y not belongs to real number in all case.