Question

If x increases from 0 to π/2,then value of cosx is

Answer 1

Answer:

decreases

Step-by-step explanation:

hope this will help you

Answer 2

Value of cos x decreases when x increases from 0 to π/2.

Step-by-step explanation:

Given:

x increases from 0 to $\frac{\pi}{2}$

To prove:

Value of cos x = ?

Solution:

We get different values of x, when x increases from 0 to $\frac{\pi}{2}$, so

cos 0 = 1

cos 30 = $cos \frac{\pi}{6}$ = $\frac{\sqrt{3} }{2}$

cos 45 = $cos \frac{\pi}{4}$ = $\frac{\sqrt{2} }{2}$

cos 60 = $cos \frac{\pi}{3}$ = $\frac{1}{2}$

cos 90 = $cos \frac{\pi}{2}$ = 0

Therefore, value of cos x decreases when x increases from from 0 to $\frac{\pi}{2}$.