Question

Ravi said that cos x=4/3 does not exist for some vale of angle x why? Explain.

Answer 1

Given:

$\cos x$ = $\dfrac{4}{3}$

We have to explain Ravi said that $\cos x$ = $\dfrac{4}{3}$ does not exist for some vale of angle x, why ?

Solution:

∴ $\cos x$ = $\dfrac{4}{3}$

∴ $\cos x$ = 1.33

We know that:

The the value of $\cos x$ is varies between

0 ≤ $\cos x$ ≤ 1

$\cos x$ = 1.33 > 1

$\cos x$ = $\dfrac{4}{3}$  is greater than 1. It does not exit any angle of x.

Thus, $\cos x$ = $\dfrac{4}{3}$ does not exit any angle of x.