Question

2 cos θ − 3 = 0

Answer 1

I want to demonstrate why this can't have a solution.

\(\LARGE\color{blue}{\bf 2 cos θ − 3 = 0 }\)

\(\LARGE\color{blue}{\bf 2 cos θ = 3 }\)

\(\LARGE\color{blue}{\bf cos θ = \frac{3}{2} }\)

Cos is adjacent/hypotenuse.

Have you ever seen hypotenuse smaller than adjacent ?