|sin a|<=a

Trigonometry equalities, inequalities and expressions - sin, cos, tan, cot

|sin a|<=a

Postby Guest » Thu Jun 13, 2019 12:57 pm

Can anyone prove this?
|sin a|<=a
I have a test tomorrow
Guest
 

Re: |sin a|<=|a|

Postby Guest » Thu Jun 13, 2019 1:04 pm

Can anyone prove this?
|sin a|<=|a|
I have a test tomorrow[/quote]
Guest
 

Re: |sin a|<=a

Postby Guest » Thu Jun 13, 2019 2:36 pm

Can anyone prove this?

It Is need to prove that this Is the true for every x

|sin a|<=a


I have a test tomorrow
Guest
 

Re: |sin a|<=a

Postby Guest » Fri Jun 14, 2019 1:41 pm

This is obviously NOT true! If x< 0, |sin(x)| is positive so x< |sin(x)|.
Guest
 


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